The more preexisting medical conditions you have from this list, the
more symptoms you are likely to have months after your initial COVID-19 diagnosis.
Symptoms at least three months after your diagnosis that have lasted for at least two months and cannot be due to any other medical conditions could qualify for a diagnosis of long COVID-19. The most common symptoms of long COVID-19 are fatigue, trouble breathing, and “brain fog,” which includes trouble with memory, thinking, and concentration.