March: Patients with infection-associated chronic conditions presciently warned of potential emergence of long-term illness after SARS-CoV-2 infection.
May: Patients conduct the first-known survey of long COVID. July: Anthony Fauci-advisor to the US President on the COVID-19 pandemic-acknowledges long COVID for the first time at the International AIDS Conference. December: Patients publish the first comprehensive characterization of long COVID symptomatology.October: WHO definition of long COVID in adults is published.