- Several Chicago-area health systems reinstate mask requirements as respiratory viruses spread NBC Chicago
- COVID Mask Mandates Return to Hospitals in Five States Newsweek
- Masking returns at many Massachusetts hospitals — and not just because of COVID GBH News
- Baystate Health requiring masks for all hospital visitors due to COVID-19 WWLP.com
- Mass General Brigham bringing back mask mandate, as Boston-area COVID wastewater surges and infections rise Boston Herald