A recent study by U.S. Government Accountability Office has elaborated on the syndrome and here is what we know about it: Long COVID, according to the Centers for Disease Control and Prevention (CDC), is the occurrence of new, returning, or ongoing health problems 4 or more weeks after an initial infection with COVID-19.
It is also known by other names, including post-acute COVID, post-COVID conditions, and chronic COVID. Symptoms of long COVID vary from person to person.
They may include fatigue, cognitive impairment (or “brain fog"), muscle or joint pain, shortness of breath, heart palpitations, sleep difficulties, and mood changes.
It can also affect multiple organ systems and cause tissue damage. The study also said, long COVID is a post-viral syndrome.