Philadelphia Requires Face Masks Indoors and Certain Large Outdoor Events, With Limited Exceptions, Unless All Present Are Vaccinated
Philadelphia reinstates indoor mask mandate - WHYY
Where Masks Are Required in Philly After Federal Mandate Ends – NBC10 Philadelphia
Inventing Ourselves: Women's Stories of Self-Discovery
COVID-19 Info for Greater Philadelphia — Visit Philadelphia
NYC Mayor Eric Adams: Face masks should be removed in stores to prevent crime : NPR
3D Printed Mask Frames Improve the Inward Protection Efficiency of a Cloth Mask
The evolving science of face masks and COVID-19
The end of Philly's mask mandate doesn't mean it's time to throw away your mask, Department of Public Health
Mask mandate: What to know about mask wearing in Pennsylvania, Philadelphia, New Jersey and Delaware - 6abc Philadelphia