Janssen COVID-19 vaccine

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"Johnson & Johnson vaccine" and "Johnson & Johnson COVID-19 vaccine" redirect here. For other J&J vaccination topics, see Janssen Vaccines.

Janssen COVID-19 vaccine
A vial of Janssen COVID-19 vaccine
Vaccine description
Target diseaseSARS-CoV-2
TypeViral vector
Names
Trade namesJanssen COVID-19 Vaccine,[1][2] COVID-19 Vaccine Janssen[3][4]
Other namesJohnson & Johnson COVID-19 vaccine
Clinical data
Drug classCOVID-19 vaccine[4]
Main usesPrevent COVID-19[4]
Side effectsInjection site pain, headache, tiredness, muscle pain, nausea[4]
Pregnancy
category
Routes of
use		Intramuscular
External links
AHFS/Drugs.comMonograph
Legal
License data
Legal status
Full list of Janssen vaccine authorizations

Janssen COVID-19 vaccine is a COVID-19 vaccine.[4] It is used in people over the age of 17 to prevent COVID-19.[4] It is given by injection into a muscle.[4] A second dose may be given 2 months after the first.[4] The initial trials found that it decreases the risk of COVID-19 after 2 weeks by 67% and severe disease by 77%.[4][1]

Most side effects are mild to moderate and resolve within a few days.[4] These may include injection site pain, headache, tiredness, muscle pain, and nausea.[4] Rare side effects may include blood clots, Guillain-Barré syndrome, low platelets, and anaphylaxis.[4] There is no evidence of harm with use in pregnancy.[24] It is a viral vector vaccine, meaning that it is made up of another virus (adenovirus) that has been modified to contain the gene for making the spike protein of the SARS-CoV-2 virus.[4]

The vaccine received emergency use authorization (EUA) in the United States in February 2021 and was approved for medical use in Europe in March 2021.[24][4] It has been authorized for use at some level in at least 82 countries as of 2022.[25] It was developed by Janssen Vaccines in the Netherlands,[26] and its Belgian parent company Janssen Pharmaceuticals,[27] a subsidiary of American company Johnson & Johnson.[26] The US government paid about 10 USD per dose and provides them for free.[28][29] The vaccine is stored refrigerated rather than frozen.[24]

Medical uses

The Janssen COVID‑19 vaccine is used to provide protection against infection by the SARS-CoV-2 virus in order to prevent COVID-19 in people aged eighteen years and older.[1][4]

The vaccine is given by intramuscular injection into the deltoid muscle. The initial course consists of a single dose.[30]

There is no evidence that a second booster dose is needed to prevent severe disease in healthy adults.[30] On 21 October, the CDC began recommending a booster dose.[31]

Efficacy

A vaccine is generally considered effective if the estimate is ≥50% with a >30% lower limit of the 95% confidence interval.[32] Efficacy is closely related to effectiveness, which is generally expected to slowly decrease over time.[33]

Efficacy by variant[lower-alpha 1]
Severity Delta Alpha Beta Lineage B.1[lower-alpha 2]
No symptoms Not reported| 74% (65–82%)[lower-alpha 3] Not reported Not reported
Moderate[lower-alpha 4] to severe[lower-alpha 5] Not reported Not reported 64% (41–79%) 72% (58–82%)
Severe to critical[lower-alpha 5] 71%[lower-alpha 6][lower-alpha 7] Not reported 82% (46–95%) 86% (−9 to 100%)

On 15 October 2021, Janssen reported at a meeting of the FDA Vaccines and Related Biological Products Advisory Committee that a single dose produced durable protection against severe disease and hospitalization for at least 6 months in the United States, even when Delta emerged, but also a global decrease in protection against moderate disease attributed to emerging variants outside the US. Janssen also reported that a booster dose given 2 months after the primary dose increased efficacy against symptomatic disease to 75% (95% CI, 55–87%) globally and to 94% (59–100%) in the US and that it also increased efficacy against severe disease to nearly 100% (33–100%) globally.[39][40]

Side effects

Review of Vaccine Adverse Events Reporting System (VAERS) safety monitoring data by the U.S. Centers for Disease Control and Prevention (CDC) through 21 April 2021 (by which time 7.98 million doses of the Janssen COVID-19 vaccine had been administered) showed that "97% of reported reactions after vaccine receipt were nonserious, consistent with preauthorization clinical trials data."[41]

The most common side effects of the vaccine in the trials were usually mild or moderate, occurred within two days after vaccination, and got better within 1 or 2 days.[20][4][42]

The most common side effects are pain at the injection site, headache, tiredness, muscle pain, and nausea, affecting more than 1 in 10 people. Coughing, joint pain, fever, chills, redness, and swelling at the injection site occurred in less than 1 in 10 people.[4] Sneezing, tremor, throat pain, rash, sweating, muscle weakness, pain in the arms and legs, backache, weakness, and feeling generally unwell occurred in less than 1 in 100 people.[4] Rare side effects (that occurred in less than 1 in 1,000 people) are hypersensitivity (allergy) and itchy rash.[4]

An increased risk of the rare and potentially fatal thrombosis with thrombocytopenia syndrome (TTS) has been associated with mainly younger female recipients of the vaccine.[43][44] This syndrome, marked by formation of blood clots in the blood vessels in combination with low levels of blood platelets 4–28 days after the vaccines administration, occurred at a rate of about 7 per 1 million vaccinated women aged 18–49 years old and it occurs more rarely in other populations (i.e., women 50 years and older and men of all ages).[45]

Allergic reactions, including anaphylaxis, can occur in rare cases within a few minutes to one hour after receiving a dose.[4][21]

In May 2021, with 7.98 million doses administered, the CDC reported four cases of anaphylaxis after vaccination (none of which resulted in death) and 28 cases of cerebral venous sinus thrombosis (of which three resulted in death).[41]

In July 2021, the U.S. fact sheet for the vaccine was updated to indicate that there may be an increased risk of Guillain-Barré syndrome during the 42 days following vaccination.[34][46][47] The European Medicines Agency (EMA) listed Guillain-Barré syndrome (GBS) as a very rare side effect of COVID-19 Vaccine Janssen and added a warning in the product information.[48]

In August 2021, the Pharmacovigilance Risk Assessment Committee (PRAC) recommended updating the product information to the European Medicines Agency (EMA) that "cases of dizziness and tinnitus (ringing or other noises in one or both ears) are linked to the administration of COVID-19 vaccine Janssen."[49]

In December 2021, the CDC recommended using the Pfizer-BioNech and Moderna vaccines in preference to the Janssen vaccine due to rare blood clotting events.[50]

Pharmacology

The vaccine consists of a replication-incompetent recombinant adenovirus type 26 (Ad26) viral vector expressing the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) spike (S) protein in a stabilized conformation.[51][52] The PER.C6 cell line derived from human embryonic retinal cells is used in the production (replication) of the Ad26 adenovirus vector.[53] It is similar to the approach used by the Oxford–AstraZeneca COVID-19 vaccine and the Russian Sputnik V COVID-19 vaccine[54][55] which use human embryonic kidney (HEK) 293 cells for adenovirus vector replication.[56][57]

The Ad26 viral vector lacks the E1 gene required for replication. Therefore, it cannot replicate in the human organism.[58][59]

Chemistry

The vaccine contains the following excipients: citric acid monohydrate, trisodium citrate dihydrate, ethanol (alcohol), 2-hydroxypropyl-β-cyclodextrin (HBCD)[60] (hydroxypropyl betadex), polysorbate 80, sodium chloride, sodium hydroxide, and hydrochloric acid.[1][52]

History

Inside an Emergent BioSolutions facility where, in collaboration with Johnson & Johnson, vaccines are produced

The stabilized version of the spike protein – that includes two mutations in which the regular amino acids are replaced with prolines – was developed by researchers at the National Institute of Allergy and Infectious Diseases' Vaccine Research Center and the University of Texas at Austin.[61][62][63]

During the COVID-19 pandemic, Johnson & Johnson committed over US$1 billion toward development of a not-for-profit vaccine in partnership with the Biomedical Advanced Research and Development Authority (BARDA) Office of the Assistant Secretary for Preparedness and Response (ASPR) at the U.S. Department of Health and Human Services (HHS).[64][65] Johnson & Johnson said its vaccine project would be "at a not-for-profit level" as the company viewed it as "the fastest and the best way to find all the collaborations in the world to make this happen".[66] In November, Johnson & Johnson announced that Janssen would commit about $604 million and BARDA would commit $454 million to fund the ENSEMBLE trial.[67]

Johnson & Johnson subsidiary Janssen Vaccines, in partnership with Beth Israel Deaconess Medical Center (BIDMC), was responsible for developing the vaccine candidate, based on the same technology used to make its Ebola vaccine.[68][69][70][71]

Clinical trials

Preclinical trials indicated that the vaccine effectively protected hamsters and rhesus macaques from SARS‐CoV‐2.[72]

Phase I–II

In June 2020, Johnson & Johnson and the National Institute of Allergy and Infectious Diseases (NIAID) confirmed that they planned to start clinical trials of the Ad26.COV2.S vaccine in September 2020, with the possibility of Phase I–IIa human clinical trials starting at an accelerated pace in the second half of July.[73][74][75]

A Phase I–IIa clinical trial started with the recruitment of the first subject on 15 July 2020 and enrolled study participants in Belgium and the US.[76] Interim results from the Phase I–IIa trial established the safety, reactogenicity, and immunogenicity of Ad26.COV2.S. With one dose, after 29 days, the vaccine ensured ninety percent of participants had enough antibodies required to neutralize the virus. After 57 days, that number reached one hundred percent.[77][78] A substudy with 20 participants found that humoral and cell-mediated immune responses, including cytotoxic T cells, lasted for at least 8 months.[79][unreliable medical source?]

Phase III

A Phase III clinical trial called ENSEMBLE started enrollment in September 2020 and completed enrollment on 17 December 2020.[80] It was designed as a randomized, double-blind, placebo-controlled clinical trial intended to evaluate the safety and efficacy of a single-dose vaccine versus placebo in adults aged 18 years and older. Study participants received a single intramuscular injection of Ad26.COV2.S at a dose level of 5×1010 virus particles on day one.[81] The trial was paused on 12 October 2020, because a volunteer became ill,[82][72] but the company said it found no evidence that the vaccine had caused the illness and announced on 23 October 2020 that it would resume the trial.[83][84] On 29 January 2021, Janssen announced safety and efficacy data from an interim analysis of ENSEMBLE trial data, which demonstrated the vaccine was 66% effective at preventing the combined endpoints of moderate and severe COVID-19 at 28 days post-vaccination among all volunteers. The interim analysis was based on 468 cases of symptomatic COVID-19 among 43,783 adult volunteers in Argentina, Brazil, Chile, Colombia, Mexico, Peru, South Africa, and the United States. No deaths related to COVID-19 were reported in the vaccine group, while five deaths in the placebo group were related to COVID-19.[85] During the trial, no anaphylaxis was observed in participants.[85]

A second Phase III clinical trial called ENSEMBLE 2 started enrollment on 12 November 2020. ENSEMBLE 2 differed from ENSEMBLE in that its study participants received two intramuscular (IM) injections of Ad26.COV2.S, one on day 1 and the next on day 57.[86] Early results indicated 85% efficacy against severe/critical disease.[79][35] Plasma from 8 participants showed greater neutralization activity against the Delta variant than against Beta.[79]

Authorizations

See also: List of COVID-19 vaccine authorizations § Janssen
  Full authorization
  Full authorization, not used
  Emergency authorization
  Allowed for travel
  Eligible COVAX recipient
  Usage stopped

European Union

Beginning on 1 December 2020, clinical trial of the vaccine candidate has been undergoing a "rolling review" process by the Committee for Medicinal Products for Human Use of the European Medicines Agency (EMA), a step to expedite EMA consideration of an expected conditional marketing authorization.[87][88] On 16 February 2021, Janssen applied to the EMA for conditional marketing authorization of the vaccine.[3][89] The European Commission approved the COVID-19 Vaccine Janssen on 11 March 2021.[4][90] In Finland, the Janssen vaccine is only offered for those aged 65 and over because of a very rare risk of thrombosis in younger age groups.[91]

United States

On 4 February 2021, Janssen Biotech applied to the U.S. Food and Drug Administration (FDA) for an EUA, and the FDA announced that its Vaccines and Related Biological Products Advisory Committee (VRBPAC) would meet on 26 February to consider the application.[92][93][94][95] On 24 February, ahead of the VRBPAC meeting, briefing documents from Janssen and the FDA were issued; the FDA document recommends granting the EUA, concluding that the results of the clinical trials and the safety data are consistent with FDA EUA guidance for COVID-19 vaccines.[52][96][97][98] At the 26 February meeting, VRBPAC voted unanimously (22–0) to recommend that a EUA for the vaccine be issued.[99] The FDA granted the EUA for the vaccine the following day.[18][19][100] On 28 February, the Advisory Committee on Immunization Practices (ACIP) of the Centers for Disease Control and Prevention (CDC) recommended the use of the vaccine for those aged 18 and older.[101][102]

On 13 April 2021, the CDC and the FDA issued a joint statement recommending that use of the Janssen vaccine be suspended, due to reports of six cases of cerebral venous sinus thrombosis—a "rare and severe" blood clot—in combination with low levels of blood platelets (thrombocytopenia), in six women between the ages of 18 and 48 who had received the vaccine.[103] The symptoms occurred 6–13 days after they had received the vaccination, and it was reported that one woman had died and a second woman had been hospitalized in critical condition.[104][105][106]

On 23 April, the FDA and the CDC determined that the recommended pause regarding the use of the Janssen COVID-19 Vaccine in the U.S. should be lifted and use of the vaccine should resume.[107][108] The EUA and the fact sheets were updated to reflect the risks of thrombosis-thrombocytopenia syndrome (TTS).[107]

Elsewhere

On 11 February 2021, Saint Vincent and the Grenadines issued an emergency authorization for the Janssen COVID-19 vaccine, as well as the Moderna COVID-19 vaccine, the Pfizer–BioNTech vaccine, the Gam-COVID-Vac vaccine (Sputnik V), and the Oxford–AstraZeneca vaccine.[109]

In December 2020, Johnson & Johnson entered into an agreement in principle with the GAVI vaccine alliance to support the COVAX Facility. On 19 February 2021, Johnson & Johnson submitted its formal request and data package to the World Health Organization for an Emergency Use Listing (EUL); an EUL is a requirement for participation in COVAX. Johnson & Johnson anticipates providing up to five hundred million doses through 2022 for COVAX.[110][111][112] The World Health Organization issued an EUL for the Janssen COVID-19 vaccine Ad26.COV2.S vaccine on 12 March 2021.[113][114]

On 18 February 2021, the vaccine received emergency authorization in South Africa.[115][116][117] On 13 April 2021, South Africa suspended its rollout of the vaccine.[118] The program resumed on 28 April 2021.

On 25 February 2021, Bahrain authorized the vaccine for emergency use.[119][120]

On 26 February 2021, the South Korean Ministry of Food and Drug Safety began a review of Johnson & Johnson's application for approval of its vaccine.[121]

In late November 2020, Johnson & Johnson submitted a rolling review application to Health Canada for approval of its vaccine.[122]

On 26 March 2021, the vaccine received emergency authorization in Colombia.[123]

In April 2021, the Australian government stated that it would not be purchasing the Janssen vaccine, as it "does not intend to purchase any further adenovirus vaccines at this time".[124][125] The Therapeutic Goods Administration granted provisional approval for use of the Janssen vaccine in Australia on 25 June 2021.[5][6]

On 19 April 2021, the vaccine received emergency use authorization in the Philippines.[126][127]

On 28 May 2021, the vaccine received conditional marketing authorization in the United Kingdom.[15][16][17][128][71]

On 10 June 2021, the vaccine received emergency use authorization in Chile. The vaccine will be provided via COVAX.[129]

On 15 June 2021, Malaysia's National Pharmaceutical Regulatory Agency (NPRA) issued conditional registration for emergency use of the vaccine.[130]

On 25 June 2021, COVID-19 Janssen Ad26.COV2.S was granted provisional approval in Australia.[5][6]

On 7 July 2021, the vaccine received provisional approval for use for people aged 18 and above in New Zealand.[131][132]

On 7 August 2021, Health and Family Welfare Minister of India announced that Johnson and Johnson single-dose vaccine was approved for emergency use in India through a supply agreement with homegrown vaccine maker Biological E. Limited.[133]

On 7 September 2021, National Agency of Drug and Food Control (BPOM) issued emergency use authorization in Indonesia.[134]

On 23 November 2021, the vaccine was approved for use in Canada.[11][12]

Further development

Homologous prime-boost

See also: COVID-19 vaccine clinical research § Homologous prime-boost vaccination

In October 2021, the FDA and the CDC authorized the use of either homologous or heterologous vaccine booster doses.[135][136][137]

Heterologous prime-boost

For use as a heterologous booster dose, see Oxford–AstraZeneca COVID-19 vaccine § Heterologous prime-boost vaccination.
See also: COVID-19 vaccine clinical research § Heterologous prime-boost vaccination

In October 2021, the US Food and Drug Administration (FDA) and the Centers for Disease Control and Prevention (CDC) authorized the use of either homologous or heterologous vaccine booster doses.[135][136] The authorization was expanded to include all adults in November 2021.[137]

Society and culture

Names

It was developed under the names Ad26.COV2.S, JNJ-78436735, Ad26COVS1, and VAC31518.[51][138][139]

Economics

Given the Janssen vaccine is a single dose and has a lower cost, it was expected to play an important role in low and middle-income countries.[140] Since it is a single dose vaccine, it has been a popular vaccine to distribute to the homeless,[141][142][143][144] the incarcerated,[145][146][144] and refugee populations.[147][146][144][148] This is due to the fact that it is difficult for these aforementioned demographics to be contacted for vaccines that require a second dose. With lower costs and lower requirements of storage and distribution in comparison to the COVID-19 vaccines by Pfizer and Moderna, the Janssen vaccine is more easily transported, stored, and administered.[149] South African health minister Zweli Mkhize announced on 9 February 2021 that the country would sell or swap its one million doses of AstraZeneca vaccine.[150] Once it did so, South Africa began vaccination using the Janssen vaccine on 17 February 2021,[117] marking the vaccine's first use outside of a clinical trial.[151]

In July 2020, Johnson & Johnson pledged to deliver up to three hundred million doses of its vaccine to the U.S., with one hundred million upfront and an option for twenty million more. The deal, worth more than $1 billion, is funded by the Biomedical Advanced Research and Development Authority (BARDA) and the U.S. Department of Defense.[152][153] The deal was confirmed on 5 August.[154]

In August 2020, Johnson & Johnson signed a contract with the U.S. federal government for $1 billion, agreeing to deliver one hundred million doses of the vaccine to the U.S. following the U.S. Food and Drug Administration (FDA) grant of approval or emergency use authorization (EUA) for the vaccine.[153] Under its agreement with the U.S. government, Johnson & Johnson was targeted to produce twelve million doses by the end of February 2021, more than sixty million doses by the end of April 2021, and more than one hundred million doses by the end of June 2021. However, in January 2021, Johnson & Johnson acknowledged manufacturing delays would likely prevent it from meeting its contract of twelve million doses delivered to the U.S. by the end of February.[155] In February 2021, through congressional testimony by a company executive, Johnson & Johnson indicated that the company could deliver twenty million doses to the U.S. government by the end of March and one hundred million doses in the first half of 2021.[156]

In February 2021, Johnson & Johnson announced that it planned to ship the vaccine immediately following authorization.[85]

In March 2021, the Canadian government placed an order with Johnson & Johnson for ten million doses, with an option to purchase up to twenty-eight million more; on 5 March, the vaccine became the fourth to receive Health Canada approval.[157]

Shipments of the vaccine were scheduled to start in the second half of April 2021, with a commitment to deliver at least two hundred million doses to the EU in 2021.[158]

The European distribution of the vaccine was slightly delayed until the EMA decided that rare cases of vaccine-induced blood clots did not outweigh the benefits of helping to fight the COVID-19 pandemic.[159]

Manufacturing

A production line at the Reig Jofre factory

Unpunctured vials may be stored between 9 to 25 °C (48 to 77 °F) for up to twelve hours,[34][52] and the vaccine can remain viable for months in a standard refrigerator.[92][110][160] It is not shipped[34][93] or stored frozen.[34]

In April 2020, Johnson & Johnson entered a partnership with Catalent to provide large-scale manufacturing of the Johnson & Johnson vaccine at Catalent's Bloomington, Indiana facility.[161] In July 2020, the partnership was expanded to include Catalent's facility in Anagni, Italy.[162]

In September 2020, Grand River Aseptic Manufacturing agreed with Johnson & Johnson to support the manufacture of the vaccine, including technology transfer and fill and finish manufacture, at its Grand Rapids, Michigan facility.[163]

In December 2020, Johnson & Johnson and Reig Jofre, a Spanish pharmaceutical company, entered into an agreement to manufacture the vaccine at Reig Jofre's Barcelona facility.[164] If the European Medicines Agency (EMA) grants approval to the vaccine by March 2021, a European Union regulator said Johnson & Johnson could start supplying vaccines to EU states starting in April 2021.[87][165] Starting in the second quarter of 2021, the factory will produce fifty million COVID-19 vaccine doses a year.[166]

In February 2021, Sanofi and Johnson & Johnson struck a deal for Sanofi to provide support and infrastructure at Sanofi's Marcy-l'Étoile, France facility to manufacture approximately twelve million doses of the Johnson & Johnson vaccine per month once authorized.[167]

In March 2021, Johnson & Johnson and Aspen Pharmacare made a deal to manufacture 220 million vaccines at Aspen's Gqeberha facility in Eastern Cape, South Africa. They plan to distribute the vaccine to other countries, mainly in Africa, and also through the COVID-19 Vaccines Global Access (COVAX) program.[168][169][170]

In March 2021, Merck & Co and Johnson & Johnson struck a deal for Merck to manufacture the Johnson & Johnson vaccine at two facilities in the United States to help expand the manufacturing capacity of the vaccine using provisions of the Defense Production Act.[171] That same month, human error at a plant run by Emergent BioSolutions in Baltimore resulted in the spoilage of up to fifteen million doses of the Johnson & Johnson vaccine. The error, which was caught before the doses left the plant, delayed expected shipments of the Johnson & Johnson vaccine within the United States.[172] As the error had involved combining ingredients of the Johnson & Johnson vaccine with the AstraZeneca vaccine, the Biden administration gave control of the plant to Johnson & Johnson and said the plant should produce only the Johnson & Johnson vaccine to avoid further mix-ups.[173] In July 2021, the FDA authorized Emergent to resume production (but not distribution) of the Janssen vaccine.[174]

Controversies

The United States Conference of Catholic Bishops has expressed concern about the vaccine, because the cell line Per.C6, which is used in development and production, was originally derived from the retinal tissue of an 18-week-old fetus electively aborted in 1985.[175][176][177][178] Although the use of fetal tissue in vaccine development has become common since the 1930s, especially with cell-based vaccines, there are currently alternatives that do not carry the same potential ethical concerns as the Janssen vaccine.[179][180] Some bioethicists dismiss that ethical concerns to using cells derived from ethically compromised sources should be addressed or alternatives sought.[181] Others advance the view that the cells used for COVID-19 vaccines today are thousands of generations removed from their source material and do not contain any fetal tissue.[175][176]

In December 2020, the Vatican published a note approved by Pope Francis, stating that "... all [COVID-19] vaccinations recognized as clinically safe and effective can be used in good conscience ..."[175][182] However, the key objection to using these vaccines still remains.[183][182][184]

In September 2021, after criticism that doses of its single-shot COVID-19 vaccine produced in Aspen Pharmacare's facility in South Africa were being exported to Europe, millions of doses that had been shipped to Europe and stored in warehouses will be returned to Africa, and newly manufactured doses will be shipped to African countries.[185]

Misinformation

See also: COVID-19 misinformation

Videos on video-sharing platforms circulated around May 2021 showing people having magnets stick to their arms after receiving the vaccine, purportedly demonstrating the conspiracy theory that vaccines contain microchips, but these videos have been debunked.[186][187][188][189]

Notes

  1. ↑ 21 September 2020 to 22 January 2021 in the United States, South Africa and Brazil.[34][35]
  2. ↑ Wuhan-H1 variant D614G.[36] Corresponds to 96% of the strains the United States during the study.
  3. ↑ Effectiveness from a study with 97,787 participants from 27 February to 22 July 22, 2021 in the United States.[37]
  4. ↑ Generally includes mild symptoms such as olfactory or taste disorders and moderate symptoms such as pneumonia.
  5. ↑ 5.0 5.1 Generally understood as requiring some form of hospitalization (from supplemental oxygen therapy to ICU admission). The same statistical variable includes cases of death.
  6. ↑ A confidence interval was not provided, so it is not possible to know the accuracy of this measurement.
  7. ↑ Effectiveness against hospitalization from a preliminary study with 477,000 healthcare workers.[38]

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 "Janssen COVID-19 Vaccine – ad26.cov2.s injection, suspension". DailyMed. U.S. National Institutes of Health. Archived from the original on 12 May 2021. Retrieved 27 February 2021.
  2. ↑ "Janssen COVID-19 Emergency Use Authorization (EUA) Official Website". Janssen. 28 February 2021. Archived from the original on 1 March 2021. Retrieved 28 February 2021.
  3. ↑ 3.0 3.1 "EMA receives application for conditional marketing authorization of COVID-19 Vaccine Janssen" (Press release). European Medicines Agency (EMA). 16 February 2021. Archived from the original on 16 February 2021. Retrieved 16 February 2021.
  4. ↑ 4.00 4.01 4.02 4.03 4.04 4.05 4.06 4.07 4.08 4.09 4.10 4.11 4.12 4.13 4.14 4.15 4.16 4.17 4.18 4.19 4.20 4.21 "COVID-19 Vaccine Janssen EPAR". European Medicines Agency (EMA). 5 March 2021. Archived from the original on 15 March 2021. Retrieved 16 March 2021. Text was copied from this source which is © European Medicines Agency. Reproduction is authorized provided the source is acknowledged.
  5. ↑ 5.0 5.1 5.2 5.3 "COVID-19 Vaccine Janssen". Therapeutic Goods Administration (TGA). 25 June 2021. Archived from the original on 28 August 2021. Retrieved 28 August 2021.
  6. ↑ 6.0 6.1 6.2 "COVID-19 vaccine: Janssen". Therapeutic Goods Administration (TGA). 27 August 2021. Archived from the original on 28 August 2021. Retrieved 28 August 2021.
  7. ↑ "Archive copy". Archived from the original on 28 August 2021. Retrieved 14 March 2022.{{cite web}}: CS1 maint: archived copy as title (link)
  8. ↑ "TGA grants third provisional approval to COVID-19 vaccine: Janssen". Therapeutic Goods Administration (TGA). 25 June 2021. Archived from the original on 14 October 2021. Retrieved 22 October 2021.
  9. ↑ "Brazil health regulator approves emergency use of Johnson & Johnson COVID-19 vaccine". Rio de Janeiro: Reuters. 31 March 2021. Archived from the original on 30 January 2022. Retrieved 1 April 2021.
  10. ↑ "Anvisa aprova uso emergencial da vacina da Janssen" [Anvisa approves emergency use of Janssen vaccine] (in Portuguese). Federal government of Brazil. Brazilian Health Regulatory Agency. 31 March 2021. Archived from the original on 20 November 2021. Retrieved 20 November 2021.{{cite news}}: CS1 maint: unrecognized language (link)
  11. ↑ 11.0 11.1 "Janssen (Johnson & Johnson) COVID-19 vaccine". Health Canada. 5 March 2021. Archived from the original on 23 November 2021. Retrieved 24 November 2021.
  12. ↑ 12.0 12.1 "Regulatory Decision Summary - Janssen COVID-19 Vaccine". Health Canada. Archived from the original on 25 November 2021. Retrieved 24 November 2021.
  13. ↑ "Regulatory Decision Summary – Janssen COVID-19 Vaccine – Health Canada". Health Canada. 5 March 2021. Archived from the original on 5 March 2021. Retrieved 5 March 2021.
  14. ↑ "Janssen COVID-19 Vaccine monograph" (PDF). Janssen. 5 March 2021. Archived (PDF) from the original on 5 March 2021. Retrieved 5 March 2021.
  15. ↑ 15.0 15.1 "Regulatory approval of COVID-19 Vaccine Janssen". Medicines and Healthcare products Regulatory Agency (MHRA). 28 May 2021. Archived from the original on 28 May 2021. Retrieved 29 May 2021.
  16. ↑ 16.0 16.1 "One-dose Janssen COVID-19 vaccine approved by the MHRA" (Press release). Medicines and Healthcare products Regulatory Agency (MHRA). 28 May 2021. Archived from the original on 28 May 2021. Retrieved 29 May 2021.
  17. ↑ 17.0 17.1 "Summary of Product Characteristics for COVID-19 Vaccine Janssen". Medicines and Healthcare products Regulatory Agency (MHRA). 28 May 2021. Archived from the original on 28 May 2021. Retrieved 29 May 2021.
  18. ↑ 18.0 18.1 "FDA Issues Emergency Use Authorization for Third COVID-19 Vaccine". U.S. Food and Drug Administration (FDA) (Press release). 27 February 2021. Archived from the original on 18 March 2021. Retrieved 27 February 2021.
  19. ↑ 19.0 19.1 "FDA Letter of Authorization" (PDF). Food and Drug Administration. 27 February 2021. Archived from the original on 10 March 2021. Retrieved 28 February 2021. ...letter is in response to a request from Janssen Biotech, Inc. that the Food and Drug Administration (FDA) issue an Emergency Use Authorization (EUA)...
  20. ↑ 20.0 20.1 "Janssen COVID-19 Vaccine". U.S. Food and Drug Administration (FDA). 19 March 2021. Archived from the original on 7 April 2021. Retrieved 7 April 2021. Public Domain This article incorporates text from this source, which is in the public domain.
  21. ↑ 21.0 21.1 "Janssen COVID-19 Vaccine (Johnson & Johnson) Standing Orders for Administering Vaccine to Persons 18 Years of Age and Older" (PDF). U.S. Centers for Disease Control and Prevention (CDC). Archived (PDF) from the original on 16 April 2021. Retrieved 16 April 2021.
  22. ↑ "Johnson & Johnson Covid vaccine approved for general use in South Africa". Archived from the original on 9 May 2021. Retrieved 9 May 2021.
  23. ↑ "J&J Covid-19 Vaccine Approved in South Africa for Wider Use". Bloomberg.com. 1 April 2021. Archived from the original on 9 April 2021. Retrieved 9 May 2021.
  24. ↑ 24.0 24.1 24.2 "COVID-19 Vaccine (Janssen) Monograph for Professionals". Drugs.com. Retrieved 29 January 2022.
  25. ↑ Holder, Josh (29 January 2021). "Tracking Coronavirus Vaccinations Around the World". The New York Times. Archived from the original on 22 December 2021. Retrieved 28 January 2022.
  26. ↑ 26.0 26.1 "Leiden developed Covid-19 vaccine submitted to EMA for approval". 16 February 2021. Archived from the original on 25 June 2021. Retrieved 15 March 2021.
  27. ↑ "Clinical trial COVID-19 vaccine candidate underway". Janssen Belgium. Archived from the original on 15 January 2021. Retrieved 13 March 2021.
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External links

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