Most patients after moderate to severe COVID-19, even after six months, suffer from several dozen different long-term complications, according to the largest survey of studies conducted by specialists of the Stanford School of Medicine.

The specialists analyzed 45 different studies published from January 2020 to March 2021. In total, they collected data from more than 9,700 patients hospitalized with moderate to severe COVID-19. In most studies, patients were followed for at least 3 months, in some - up to six months.

The researchers found that 72.5% of people who underwent hospitalization reported at least one persistent symptom months after discharge. In total, 84 symptoms were identified that persist long-term after COVID-19, which are linked to disturbances in many body systems, including the cardiac, respiratory, neuromuscular, neurological, circulatory and immune systems.

Most often, patients complained of chronic fatigue (40%), shortness of breath (36%), sleep disturbances (29%), difficulties with concentration and memory (25%), as well as depression and anxiety (20%).