noun: (medicine, pathology) Long-term symptoms or sequelae (such as extreme fatigue, shortness of breath, or brain fog), following a COVID-19 infection, which persist after the virus is no longer active.
noun: Alternative letter-case form of long Covid [(medicine, pathology) Long-term symptoms or sequelae (such as extreme fatigue, shortness of breath, or brain fog), following a COVID-19 infection, which persist after the virus is no longer active.]