Long COVID
Long COVID, also called post-COVID condition, is a chronic condition that can follow SARS-CoV-2 infection and cause symptoms affecting one or more body systems for months or longer.
At a glance
Quick facts
- Relationship
- Can follow SARS-CoV-2 infection
- WHO estimate
- ~6 in 100 people after COVID-19
- Common symptoms
- Fatigue · breathlessness · pain · sleep problems
- Timing
- Usually begins within 3 months
- Duration
- Symptoms last at least 2 months in WHO definition
- Care
- Individualized symptom management and rehabilitation
Dr. Fitsum Admasu Tinsae
General Medicine · Public Health · Digital Health
Reviewed for clinical accuracy, clarity and practical public-health context.
Terminology
Long COVID is also referred to as Post COVID-19 condition, Post-COVID condition, PCC, Post-acute sequelae of SARS-CoV-2 infection.
Clinical profile
Long COVID at a glance
Overview
Post-COVID condition can follow SARS-CoV-2 infection even when the acute illness was not severe. Symptoms may fluctuate or relapse, and people can be affected in different ways.
Long COVID is related to, but distinct from, the acute infection. For current information on the virus, testing, treatment, variants and vaccination, see the COVID-19 reference hub.
Symptoms and signs
Long COVID can affect many systems; fatigue, breathlessness, pain and sleep problems are among the symptoms WHO highlights most often.
SYMPTOM MATRIX
How long covid may present
A practical grouping for reference; not every person has every feature.
- Fatigue
- Shortness of breath
- Muscle or joint pain
- Sleep disturbance
- Difficulty thinking or concentrating
- Headache
- Palpitations
- Dizziness
- Altered smell or taste
- Mood symptoms
- Post-exertional symptom worsening
- New or severe breathing difficulty
- Chest pain or pressure
- Fainting or severe palpitations
- New focal neurological symptoms
- Rapid clinical deterioration
New severe symptoms should not automatically be attributed to long COVID; urgent conditions still need assessment.
Diagnosis and assessment
A prior confirmed test can help, but absence of documented testing does not always exclude a past infection.
There is no single laboratory test that confirms or excludes Long COVID, and the absence of a documented positive test does not necessarily rule it out. Diagnosis depends on the clinical history and exclusion of alternative explanations.
Diagnostic pathway
How long covid is assessed
Testing and clinical context are interpreted together.
Treatment and care
There is no single long COVID pattern, so care starts with the symptoms, functional impact and alternative diagnoses relevant to the individual.
Treatment & care hub
Managing long covid
Care depends on severity, risk factors and individual circumstances.
Identify the dominant symptoms and limitations
There is no single long COVID pattern, so care starts with the symptoms, functional impact and alternative diagnoses relevant to the individual.
Treat specific symptoms where possible
Clinicians may use symptom-directed medicines or other interventions for pain, sleep problems, breathlessness, autonomic symptoms or other issues when appropriate.
Rehabilitation and activity planning
Rehabilitation can support function, but programmes should be individualized, especially when exertion triggers a delayed worsening of symptoms.
Work, education and psychosocial support
Long COVID can affect daily activities and participation; practical accommodations and multidisciplinary support may be important.
WHO global estimate
How often post-COVID condition develops
The estimate summarizes infection-to-condition risk and should not be read as a current population prevalence estimate.
Common questions
Frequently asked questions
Long COVID, also called post-COVID condition, is a chronic condition that can develop after SARS-CoV-2 infection and affect one or more body systems.
WHO estimated in 2025 that approximately 6 in every 100 people who have COVID-19 develop post-COVID condition, while noting that the risk appears lower now than earlier in the pandemic.
Common symptoms include fatigue, breathlessness, muscle or joint pain, sleep problems, and cognitive difficulties, but many other symptoms can occur.
No. Diagnosis is clinical and usually requires assessment of symptoms, timing, functional impact and other possible explanations.
There is no single treatment that cures all long COVID. Care is individualized and may include symptom treatment, rehabilitation and support for functional limitations.
In addition to fatigue and breathlessness, I look for recurring headaches, gastrointestinal symptoms, light-headedness or a fast heart rate, persistent cough and changes in smell or taste.