FILE - In this Sept. 13, 2021, file photo, staff at the Modern Museum of Art check visitors' proof of vaccination in New York. COVID-19 deaths in the U.S. are coming down again, hospitalizations are dropping, and new cases per day are about to dip below 100,000 for the first time in two months — all signs that the summer surge is waning. Not wanting to lose momentum, government leaders and employers are looking at strengthening and expanding vaccine requirements. (AP Photo/Seth Wenig, File)