Masks have limited eficacy, a fitted N-95, ones that are professionally fitted to form over your face have 95% eficacy, but are horrible to wear all day.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://aapsonline.org/mask-facts/&ved=2ahUKEwjv4MK1tPbqAhXqUN8KHUJsDVQQFjAJegQIAhAB&usg=AOvVaw2dDRvQMI4iBCY7hg9OvWrH
Masks have limited eficacy, a fitted N-95, ones that are professionally fitted to form over your face have 95% eficacy, but are horrible to wear all day.
Masks have limited eficacy, a fitted N-95, ones that are professionally fitted to form over your face have 95% eficacy, but are horrible to wear all day.
https://www.google.com/url?sa=t&source=web&rct=j&url=https://aapsonline.org/mask-facts/&ved=2ahUKEwjv4MK1tPbqAhXqUN8KHUJsDVQQFjAJegQIAhAB&usg=AOvVaw2dDRvQMI4iBCY7hg9OvWrH