What do you think @mjb302
RT @EricTopol: A randomized trial of medical masks vs N95s in health care workers to prevent Covid https://www.acpjournals.org/doi/10.7326/M22-1966
—It's woefully underpowered but ruled out a doubling of hazard for use of medical masks
—In 3 of the 4 countries there was less risk with N95s (p=NS)

🐦🔗: https://nitter.eu/NChildersMEP/status/1597568152908759042