How long does COVID last? Mild or moderate COVID-19 lasts about two weeks for most people. But others experience lingering health problems even after the fever and cough go away and they are no longer testing positive for the illness. Parker notes that the World Health Organization has developed a definition for post-COVID-19 condition (the WHO's term for long COVID) as coronavirus symptoms that persist or return three months after a person becomes ill from infection with SARS CoV-2, the coronavirus that causes COVID-19. Those symptoms can include: Fatigue Shortness of breath Cognitive problems (thinking and memory) The symptoms can come and go, but have an impact on the person's everyday functioning, and cannot be explained by another health problem. What causes post-COVID syndrome? While it's clear that people with certain risk factors (including high blood pressure, smoking, diabetes, obesity and other conditions) are more likely to have a serious bout of COVID-19, there isn't a clear link between these risk factors and long-term problems. In fact, long COVID can happen in people who have mild symptoms, although patients with more severe initial illness seem to be more likely to have long-term impairments. More studies will shed light on why these stubborn health problems persist in some people.
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