I don't believe it's like this, some people really get sick and maybe they were in a hospital, how can they work for there? And its some important member of the team everything has to wait for him, and what if more people got sick from the same team if they worked in the same office?
Some projects are using Covid like an excuse, but not all of them!
Coronavirus is a kind of help for many people. They can work at home, and even being sick also. There are no excuses only for lazy bones, who find the reasons for their mischiefs all the time. Successful guys are workaholics.