The protein CD47 may contribute to the severity of COVID-19 infections in people - FingerLakes1.com

It appears that individuals with higher levels of the CD47 protein present on the surface of infected cells blocks the immune system from fighting the virus.

The issue is that the CD47 protein signals the immune system to not harm it, and if it’s in the way then the immune system can’t get around it.

The job of the protein is to signal the immune system to not attack healthy cells.