Long COVID is a constellation of symptoms due to the involvement of various body symptoms in COVID patients after the acute phase. This develops after COVID pneumonia and continues for greater than 12 weeks. ​Similar symptoms have been seen with Severe Acute Respiratory Syndrome (SARS), Middle East Respiratory Syndrome (MERS), and Influenza (H1N1 and H7N9). Symptoms can occur in hospitalized and non-hospitalized patients.