Updated evidence suggests masks may reduce risk for SARS-CoV-2 infection in community and health care settings

The final and major update to a rapid, living review of published evidence suggests that masks may be associated with a small reduction in risk for COVID-19 infection in community settings versus no mask use and both surgical masks and N95 respirators may be associated with similar infection risk in routine patient care settings. However, a beneficial effect of N95 respirators could not be ruled out in the health care setting. The review is published in Annals of Internal Medicine.

In some settings, medical masks may offer similar effectiveness to N95 respirators for preventing COVID-19 infection among health care workers

A study of more than 1,000 health care workers was unable to establish whether medical masks are significantly less effective at preventing COVID-19 infection than N95 respirators in hospital settings. The findings varied across countries, which were studied during different times in the pandemic, and uncertainty in the estimates of effect limit definitiveness of findings. The study is published in Annals of Internal Medicine.

This Anti-COVID Mask Breaks the Mold

To address PPE shortages during the pandemic, scientists at Berkeley Lab and UC Berkeley are developing a rechargeable, reusable, anti-COVID N95 mask and a 3D-printable silicon-cast mask mold.