COVID-19 (coronavirus disease 2019) is an illness caused by a virus. Many people get better within a few days or weeks after being infected with the virus. But others have post-COVID conditions. They may:
- Have symptoms that linger for weeks, months, or even years
- Seem to recover from COVID-19 but then see their symptoms return
- Develop new symptoms or new health conditions within a few months of having COVID-19
There are several other names for post-COVID conditions. It is often called long COVID. But it can also be called long-haul COVID, long-term effects of COVID, chronic COVID, post-acute COVID-19, and post-acute sequelae of SARS-CoV-2 (PASC).
Source: https://medlineplus.gov/postcovidconditionslongcovid.html
