Notwithstanding, the highly transmissible Omicron variant is now at play. Officials “strongly” encouraged members to wear N95 or KN95 masks as in-person instruction resumes in an email sent to GW ...
As we saw with COVID-19, the masks most effective in protecting against smoke inhalation are N95 respirator masks and KN95 masks. However, Lang emphasizes that even a fabric mask or bandana is ...