It is too early for scientists to know much about the relationship between omicron, vaccination and long COVID-19. Can omicron cause long COVID-19? Because the omicron variant was first identified in late November, it is too early to say how long symptoms of infection can persist. Milder initial illnesses do not necessarily mean that omicron is less likely to lead to long COVID-19, doctors, researchers and patient-led groups caution. The cause of long COVID-19 is still unclear, and different symptoms might have different underlying causes in different patients, experts say.

Source: New York Times January 21, 2022 15:52 UTC