I have a friend that has had COVID-19 at least one, and he swears he also got it in 2019 along with the friends he was hanging out with that weekend. There are

I have a friend that has had COVID-19 at least one, and he swears he also got it in 2019 along with the friends he was hanging out with that weekend. There are probably lots of instances like this and we may never know for sure.