Mass transportation is ground zero for corona infections. If/when this starts up again, look for cases to spike.
@T2K, I too would absolutely believe this.
But I am deeply puzzled by the fact that this is totally NOT the case in either Tokyo/Japan or Seoul/S. Korea. Their mass transportation is at least as population dense as NYC. I am therefore left to believe that it must be mask wearing that makes this amazing impact.
I have also considered that it could be (a) a different virus strain (b) different sub populations (genetic/ethnic), or whatever else.
But all of these I put at a much lower probability than the simple remedy of proper mask wearing.
Separately, I noted the back and forth on masks versus distancing and the false question on which ONE should it be. It never made sense to me that the answer needed to be just one of these two. But, gun to my head (and only in such a scenario!), I'd go with masks. Especially so because of the Japanese/Korean experience.
That is why I believe what you are saying. If we don't wear masks (properly as @WhiteBus often reminds us), then your prediction will unfortunately come true.