That isn't something you can quantify. By all means take reasonable steps to avoid infection, but the most likely outcome is that no matter what we do the majority of us will be infected before a vaccine is available. There are already four other endemic coronaviruses which circulate in humans and SARS-CoV-2 is going to be the fifth.

https://patch.com/california/losgatos/bay-area-s-dr-fauci-ex...