65% drop in severe asthma, Israeli hospital says it’s the masks
Prof. Nancy Agmon-Levin, who conducted the study, told The Jerusalem Post that she believes “masks blocked infectious agents and definitely pollen.”
An ultra-Orthodox man wears three masks over his face while celebrating Purim amid coronavirus disease (COVID-19) restrictions in Jerusalem February 28, 2021 (photo credit: RONEN ZVULUN/REUTERS)Updated: 
