The U.S. Center for Disease Control and Prevention says “the war has changed” because of the COVID-19 Delta variant, and with concerns rising across the country, at least two Philadelphia restaurants have changed their rules. Martha said Saturday it will require all guests to provide proof of vaccination to dine indoors or sit at its bar.

https://philadelphia.cbslocal.com/2021/07/31/martha-irwins-upstairs-proof-covid-vaccination-philadelphia-restaurants/