How much do masks actually protect us from coronavirus?
Scarves, which reduced infection risk by 44% after 30 seconds and 24% after 20 minutes, and similarly effective cotton t-shirts are only slightly better than wearing no mask at all.
An employee wearing a protective face mask and face guard works on the automobile assembly line during the outbreak of the coronavirus disease (COVID-19) at the factory of Mitsubishi Fuso Truck and Bus Corp. in Kawasaki(photo credit: REUTERS)ByTOBIAS SIEGAL
