"Going to be hard to sue a business over a covid infection and win. The person or persons went to that place of business on their own free will fully knowing the risk. "
I disagree. And others do as well which is why some have created new laws or seek the creation of new laws.
Again, and as an example:
https://www.wsj.com/articles/liability-shield-is-next-coronavirus-aid-battle-11588589100