I tested positive for Covid last year. Being a cardiac patient my MD put me on Paxlovid. I got the rebound, but it wasn't as bad as the first and my symptoms were simply cold like. It looks like about one in five get a rebound.

This is interesting. They call it "Covid Rebound".

https://www.yalemedicine.org/news/what-is-pax...id-rebound

This one calls it "Viral Rebound".

https://hms.harvard.edu/news/one-five-experie...tudy-shows