A human B-cell. These are the immune system cells that make antibodies. | NIAID

A 33-year-old man was confirmed to be reinfected with Covid-19. This likely isn’t as bad as it sounds. 

Researchers in Hong Kong have reported that a 33-year-old man has been reinfected with SARS-CoV-2, the virus the causes the Covid-19 disease. There have been anecdotal reports of reinfections in the US, but this time researchers have clearer evidence: They determined the genetic signature of the second infection did not match that of the first.

There’s still a lot not known about the case. The researchers, who are medical scientists from the University of Hong Kong, announced their finding in a press release. (They say a paper in the journal Clinical Infectious Diseases is forthcoming; a few pages of the report are circulating on Twitter.) When the report is finally published,