6. Post-COVID condition or Long COVID
The World Health Organization (WHO) refers to Long Covid (or post-Covid condition) as the presence of symptoms 3 months or more after a Covid infection, with persistence of symptoms for at least 2 months and which cannot be explained by another disease.
Long Covid may occur after a severe Covid infection, as well as a mild one. Symptoms may even appear later even though the person had no symptoms at the time of infection.
Preliminary studies suggest that long Covid affects about 3 out of 10 people more than 6 months after infection. It affects adults, but can also affect teenagers and, more rarely, children. It causes various discomforts and disabilities in their daily lives.
The most common symptoms are fatigue, shortness of breath, difficulty concentrating or other symptoms that have a negative impact on daily life. Symptoms often fluctuate, and tend to improve over time, but may last for months or even longer than a year.