Post COVID-19 condition

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Post COVID-19 condition
Other names: Long COVID,[1] post-COVID,[1] persistent post-COVID syndrome (PPCS),[2] chronic COVID syndrome (CCS), COVID long-haulers,[3] post COVID-19 syndrome,[4] post-acute sequelae of SARS-CoV-2 infection,[5] post-acute sequelae of COVID-19 (PASC)[6]
An individual with fatigue
SpecialtyMultidisciplinary
SymptomsTiredness, shortness of breath, headaches, anxiety and depression, loss of smell, difficulty concentrating, fever, palpitations[1]
Usual onset>4 weeks post COVID-19[5]
TypesMultisystem inflammatory syndrome (MIS), post-intensive care syndrome (PICS)[5]
CausesCOVID-19[5]
Diagnostic methodBased on symptoms after ruling out other causes[7]
PreventionPreventing COVID-19[1]
TreatmentAddressing specific symptoms[8]
Frequency~20 to 60%[9][10]

Post COVID-19 condition, which includes long COVID, are a group of conditions that occur after having COVID-19.[1][11] It involves symptoms that occur four or more weeks after the initial infection.[1] Symptoms may include tiredness, shortness of breath, headaches, anxiety and depression, loss of smell, difficulty concentrating, headaches, fever, and palpitations.[1] Symptoms may also get worse with activity.[1]

It may occur in anyone following COVID-19, regardless of the severity of the original infection.[1] A number of cases have occurred in those infected despite being vaccination; though it is less common in this group.[12] Those who have had severe illness may also have damage to multiple organ system, develop autoimmune conditions, post-intensive care syndrome (PICS), or post-traumatic stress disorder (PTSD).[1][5] Children may experience multisystem inflammatory syndrome in children (MIS-C).[1]

The case definition is still being developed.[5] There are no specific laboratory or imaging findings that confirm or rules out the condition; though other potential causes should be excluded.[8][7]

Prevention is by preventing COVID-19, including vaccination, physical distancing, and wearing a face mask.[1] Treatment involves efforts to address specific symptoms and improve physical, mental, and social wellbeing.[8] Specialized clinics have been created, in certain jurisdictions, to try to address the condition.[13][14] About 20% of people diagnosed with COVID have symptoms for longer than 4 weeks and 10% of people for longer than 12 weeks.[9] Women are more commonly affected than men.[7]

Signs and symptoms

Long term COVID-19 symptoms.[15]

Long-term health problems can occur after the typical recovery period—of coronavirus disease 2019 (COVID-19). Such problems include respiratory system disorders, nervous system and neurocognitive disorders, mental health disorders, metabolic disorders, cardiovascular disorders, gastrointestinal disorders, tiredness, musculoskeletal pain, and anemia.[16]

Varying combinations of symptoms that have been reported weeks or months following COVID-19, whether the initial illness was severe, mild or without symptoms, are numerous.[17][18] They include:

Other problems reported following COVID-19 include:

Cause

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It is unknown why most people recover fully within two to three weeks and others experience symptoms for long.[19] It is hypothesized that ongoing long COVID symptoms may be due to four syndromes:[20][21]

Other situations that might cause new and ongoing symptoms include:

Risk factors

Risk factors may include:[23][24][25]

  • Age – particularly those aged over 50
  • Excess weight
  • Asthma
  • Reporting more than five symptoms (e.g. more than cough, fatigue, headache, diarrhoea, loss of sense of smell) in the first week of COVID-19 infection; five is the median number reported

Women are less likely to develop severe acute COVID but more likely to develop long COVID than men.[26] Some research suggests this is due primarily to hormonal differences,[27][28] while other research points to other factors, including chromosomal genetics, sex-dependent differences in immune system behavior, and non-biological factors may be relevant.[26]

Diagnosis

Most people affected by COVID-19 make a full recovery within three months, but for some the symptoms last longer.[29][30] Long COVID has no single clear definition.[26] Generally, people who have ongoing symptoms lasting longer than expected after recovering from COVID-19 are classed as having long COVID. The term has been used to describe the presence of symptoms lasting longer than 12 weeks. It has also been used to describe those who required intensive care, and those who did not require hospital admission but later presented with or without symptoms and signs of end-organ damage such as cardiac or respiratory disease.[31]

British definition

The British National Institute for Health and Care Excellence (NICE) divides COVID-19 into three clinical definitions:

  • acute COVID-19 for signs and symptoms during the first 4 weeks after infection with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2),
  • new or ongoing symptoms 4 weeks or more after the start of acute COVID-19, which is divided into:
    • ongoing symptomatic COVID-19 for effects from 4 to 12 weeks after onset, and
    • post-COVID-19 syndrome for effects that persist 12 or more weeks after onset.

NICE describes the term long COVID, which it uses "in addition to the clinical case definitions", as "commonly used to describe signs and symptoms that continue or develop after acute COVID-19. It includes both ongoing symptomatic COVID-19 (from 4 to 12 weeks) and post-COVID-19 syndrome (12 weeks or more)".[32] NICE defines post-COVID-19 syndrome as "Signs and symptoms that develop during or after an infection consistent with COVID‑19, continue for more than 12 weeks and are not explained by an alternative diagnosis. It usually presents with clusters of symptoms, often overlapping, which can fluctuate and change over time and can affect any system in the body. Post‑COVID‑19 syndrome may be considered before 12 weeks while the possibility of an alternative underlying disease is also being assessed".[32]

US definition

In February 2021, the National Institutes of Health said symptoms of long COVID can include fatigue, shortness of breath, "brain fog", sleep disorders, intermittent fevers, gastrointestinal symptoms, anxiety, and depression. Symptoms can persist for months and can range from mild to incapacitating, with new symptoms arising well after the time of infection. NIH Director Francis Collins said the condition can be collectively referred to as post-acute sequelae of SARS-CoV-2 infection (PASC).[33]

Differential diagnosis

Long COVID is similar to post-Ebola syndrome and the post-infection syndromes seen in chikungunya and the infections that appear to trigger ME/CFS, and the pathophysiology of long COVID may be similar to these other conditions.[26] Some people with long COVID in Canada have been diagnosed with ME/CFS, a multi-system neurological disease that is believed to be triggered by an infectious illness in the majority of cases". Lucinda Bateman, a specialist in ME/CFS in Salt Lake City in the US believes that the two syndromes are identical. There is need for more research into ME/CFS; Anthony Fauci, chief medical adviser to the US government, said that COVID-19 is a "well-identified etiologic agent that should be very helpful now in getting us to be able to understand [ME?CFS]”.[34]

Managemnt

In terms of treatment for this condition, long COVID, the following is advisable:[35]

Epidemiology

Some reports of long-term illness after infection appeared early during the COVID-19 pandemic,[36][20] including in people who had a mild or moderate initial infection[37] as well as those who were admitted to hospital with more severe infection.[38][39]

As of January 2021, the precise incidence was unknown. The incidence declines over time, as many people slowly recover. Some early studies suggested that between 20% and 33% of people with COVID-19 experienced symptoms lasting longer than a month.[9][40] A telephone survey in the US in the first half of 2020 showed that about 35% of people who had tested positive for SARS-CoV-2 experienced a range of symptoms that lasted longer than three weeks.[41] As of December 2020, the Office of National Statistics in the UK estimated that, of all people with a positive test for SARS-CoV-2, about 21% experienced symptoms for longer than five weeks, and about 10% experienced symptoms for longer than 12 weeks.[9][42][43]

Some studies have suggested that some children experience lingering symptoms of SARS-CoV-2 infection.[9][44][45]

Although anyone who gets infected can develop long COVID, people who become so sick that they require hospitalization take longer to recover. A majority (up to 80%[46]) of those who were admitted to hospital with severe disease experience long-term problems including fatigue and shortness of breath (dyspnoea).[20][47][48] Patients with severe initial infection, particularly those who required mechanical ventilation to help breathing, are also likely to suffer from post-intensive care syndrome following recovery.[38] A study of patients who had been hospitalised in Wuhan found that the majority still had at least one symptom after six months. Patients who had been more severely ill still showed severe incapacity in lung function.[49] Among the 1733 patients who had been discharged from hospital and followed up about six months later, the most common symptoms were fatigue or muscle weakness (63%), sleep difficulties (26%), and anxiety or depression (23%).[50]

Some people suffer long-term neurologic symptoms despite never having been hospitalized for COVID-19; the first study of this population was published in March 2021. Most frequently, these non-hospitalized patients experienced "prominent and persistent 'brain fog' and fatigue that affect their cognition and quality of life."[51][52]

In January 2021, a large study in Wuhan, China, showed that 76% of people admitted with COVID-19, still had at least one symptom six months later.[53] In the same month, a study in the UK reported that 30% of recovered patients were readmitted to hospital within 140 days, and 12% of the total died. Many patients had developed diabetes for the first time, as well as problems with heart, liver and kidney problems. The mode of insulin failure was at that point unknown.[54]

In March 2021, the Indonesian Doctors Association, in a survey of 463 people, suggested that 63.5% of respondents self-reported lingering symptoms after SARS-CoV-2 infection. The exact set of symptoms was not specified, however, according to the article, fatigue and cough were the most commonly reported symptoms, followed by muscle pain and headache.[55]

History

Elisa Perego, an archaeologist at University College London, first used term Long COVID as a hashtag on Twitter in May 2020.[56][57]

Society and culture

Health system response

United States

Dr. Anthony S. Fauci has described long-term Covid-19 as “...a phenomenon that is really quite real and quite extensive,” but also said that the number of cases is unknown.[58]

On February 23, 2021, National Institutes of Health Director Francis Collins announced a major initiative to identify the causes and ultimately the means of prevention and treatment of people who are suffering from Long COVID.[33] Part of this initiative includes the creation of the COVID-19 Project.[59]

Australia

In October 2020, a guide published by the Royal Australian College of General Practitioners (RACGP) says that ongoing post-COVID-19 infection symptoms such as fatigue, shortness of breath and chest pain will require management by GPs, in addition to the more severe conditions already documented.[46]

United Kingdom

In Britain, the National Health Service set up specialist clinics for the treatment of long COVID.[60] The four Chief Medical Officers of the UK were warned of academic concern over long COVID on 21 September 2020 in a letter written by Trisha Greenhalgh published in The BMJ[61] signed by academics including David Hunter, Martin McKee, Susan Michie, Melinda Mills, Christina Pagel, Stephen Reicher, Gabriel Scally, Devi Sridhar, Charles Tannock, Yee Whye Teh, and Harry Burns, former CMO for Scotland.[61] In October 2020, NHS England's head Simon Stevens announced the NHS had committed £10 million to be spent that year on setting up long COVID clinics to assess patients' physical, cognitive, and psychological conditions and to provide specialist treatment. Future clinical guidelines were announced, with further research on 10,000 patients planned and a designated task-force to be set up, along with an online rehabilitation service[62] – "Your Covid Recovery".[63] The clinics include a variety of medical professionals and therapists, with the aim of providing "joined-up care for physical and mental health”.[43]

The National Institute for Health Research has allocated funding for research into the mechanisms behind symptoms of Long COVID.[43]

In December 2020, University College London Hospitals (UCLH) opened a second Long Covid clinic at the National Hospital for Neurology and Neurosurgery for patients with post-Covid neurological issues. The first clinic had opened in May, primarily focused on respiratory problems, but both clinics refer patients to other specialists where needed, including cardiologists, physiotherapists and psychiatrists.[64]

On 18 December 2020, the National Institute for Health and Care Excellence (NICE), the Royal College of General Practitioners (RCGP) and the Scottish Intercollegiate Guidelines Network (SIGN) published a guide to the management of Long COVID.[65]

South Africa

In October 2020, the DATCOV Hospital Surveillance Department of the National Institute for Communicable Diseases (NICD) looked into a partnership with the International Severe Acute Respiratory and emerging Infection Consortium (ISARIC) in order to conduct clinical research into the impact PASC may have within the South African Context. As of the 30th of January 2021, the project has yet to receive ethical approval for the commencement of data collection. Ethics approval was granted on the 3rd of February 2021 and formal data collection began on the 8th of February 2021.

Public response

Some people experiencing long COVID have formed groups on social media sites.[66][67][68][69] There is an active international long COVID patient advocacy movement[70][71] which includes research led by patients themselves.[72][73]

In many of these groups, individuals express frustration and their sense that their problems have been dismissed by medical professionals.[69]

Special populations

Children

A study in Italy, which analyzed 129 children under the age of 18, examined health data obtained via a questionnaire between September 2020 and January 1, 2021. 53% of the group experienced COVID-19 symptoms more than 120 days after their diagnosis. Symptoms included chest tightness and pain, nasal congestion, tiredness, difficulty concentrating and muscle pain. A case report of 5 children in Sweden also reported symptoms (fatigue, heart palpitations, dyspnoea, headaches, muscle weakness and difficulty concentrating) persisting for 6–8 months after diagnosis.[44]

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 "COVID-19 and Your Health". Centers for Disease Control and Prevention. 11 February 2020. Archived from the original on 14 January 2022. Retrieved 20 January 2022.
  2. ↑ 2.0 2.1 Oronsky, Bryan; Larson, Christopher; Hammond, Terese C.; Oronsky, Arnold; Kesari, Santosh; Lybeck, Michelle; Reid, Tony R. (20 February 2021). "A Review of Persistent Post-COVID Syndrome (PPCS)". Clinical Reviews in Allergy & Immunology. doi:10.1007/s12016-021-08848-3. ISSN 1559-0267. PMID 33609255. Archived from the original on 28 August 2021. Retrieved 13 May 2021.
  3. ↑ Baig AM (October 2020). "Chronic COVID Syndrome: Need for an appropriate medical terminology for Long-COVID and COVID Long-Haulers". Journal of Medical Virology. 93 (5): 2555–2556. doi:10.1002/jmv.26624. PMID 33095459.
  4. ↑ NICE (18 December 2020). "Overview | COVID-19 rapid guideline: managing the long-term effects of COVID-19 | Guidance | NICE". www.nice.org.uk. National Institute for Health and Care Excellence. Archived from the original on 13 May 2021. Retrieved 13 May 2021.
  5. ↑ 5.0 5.1 5.2 5.3 5.4 5.5 "Healthcare Workers". Centers for Disease Control and Prevention. 11 February 2020. Archived from the original on 21 January 2022. Retrieved 20 January 2022.
  6. ↑ "NIH launches new initiative to study "Long COVID"". National Institutes of Health (NIH). 23 February 2021. Archived from the original on 13 May 2021. Retrieved 13 May 2021.
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  59. ↑ "COVID-19 Neuro Databank-Biobank". NYU Langone Health. Archived from the original on 2021-07-09. Retrieved 2021-02-26.
  60. ↑ Cookson C (15 October 2020). "'Long Covid' symptoms can last for months". Financial Times. Archived from the original on 18 October 2020. Retrieved 15 October 2020.
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  73. ↑ Callard, Felicity; Perego, Elisa (2021-01-01). "How and why patients made Long Covid". Social Science & Medicine. 268: 113426. doi:10.1016/j.socscimed.2020.113426. ISSN 0277-9536. PMC 7539940. PMID 33199035.

External links

  • Long Covid on YouTube (21 October 2020). – UK Government film about long COVID.
  • "PHOSP". Home. University of Leicester. Archived from the original on 2020-11-01. Retrieved 2020-10-18. The Post-hospitalisation COVID-19 study (PHOSP-COVID) is a consortium of leading researchers and clinicians from across the UK working together to understand and improve long-term health outcomes for patients who have been in hospital with confirmed or suspected COVID-19.
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