NYC Mayor Goes “Full Macron” And Requires Vaccine Proof To Do Stuff

Amid rising cases of the delta variant, New York City is re-instating some COVID precautions that it had previously rolled back. What does the science have to say about the policy? On Today's Show: Nsikan Akpan , WNYC's health and science editor, breaks down the science behind breakthrough infections, local pols' decisions not to mandate indoor masking and more COVID news.