In NYC the vaccine effectiveness has dropped from 93% to 79%. Wear a mask.

New COVID-19 Cases and Hospitalizations Among Adults, by Vaccination Status — New York, May 3–July 25, 2021: 

During May 3–July 25, 2021, the overall age-adjusted vaccine effectiveness against hospitalization in New York was relatively stable (91.9%–95.3%). The overall age-adjusted vaccine effectiveness against infection for all New York adults declined from 91.7% to 79.8%.

Some of the breakthrough cases are particularly nasty.  Masking, social distancing, handwashing--all the stuff we learned during the first round applies now.  Do it for the immunocompromised.