Your immunity system is needed to natural fight virus. We weaken the immune system by disinfecting everything, social distanceing, and always washing our hands. People are not meant to live in a STERILE environment/field, but Surgical Doctors/nurses work in Sterile fields/environments that is the only reason that they have to wear a mask for a short time while performing surgery on a patient, so that the dr. doesn't get his/her germs onto the patients internal organs in which the patient could die from infection of the doctors/nurses germs. when you wear a mask you are breathing in your own carbon dioxide. Carbon dioxide kills people!