This is new terminology used by the CDC to describe long COVID, long-haul COVID or chronic COVID.
Deeper dive
Sequelae means the aftereffect of a disease. Post-acute sequelae COVID (P.A.S.C) represents a wide range of new, returning, and ongoing health problems that people experience for four or more weeks after being infected with SARS-CoV-2.
Symptoms associated with post-acute sequelae COVID include shortness of breath or difficulty breathing, fatigue, brain fog, dizziness upon standing, chest pain, depression or anxiety, fever, loss of taste or smell and other multi-organ effects, including the heart, lungs, kidneys, skin, and brain, and particularly the multisystem inflammatory syndrome in children. Though there remain many unknowns about the condition, scientists currently believe around 10% to 20% of those infected develop long-COVID symptoms.