It doesn’t provide perfect protection but it’s pretty good. With a virulent variant and less than 50% vax rates in some places though it’s not gonna to be close to perfect there.
The weekend before this one I was at 3 baseball games with over 30K of my closest friends. Small park and crowded inside.
I felt good but just to be on the safe side I got a test the end of last week with my boys, one of whom is going back to ND Law. Negative. Now it’s anecdotal but I can tell you it worked for the three of us in preventing contraction.