Masks are to protect the user and the public. Asymptomatic infection is insidous. There is no early warning that someone is infectious if they are not actively coughing or sneezing with a respiratory virus. You just don’t know who to avoid. Further, how do you know someone has not coughed or sneezed in a grocery store, in a corner of a restaurant, or earlier in a line of people waiting to be served? Covid-19 can stay active on surfaces for hours, including packages of food. For example, you open a package of mushrooms, or whatever, with your bare hands and absent mindedly pop one into your mouth while cooking.
Our medical and political leadership need to unambiguously tell us what we need to wear, how we should wear it, and how long can we wear it before either disinfecting it or replacing it. We have all heard of social distancing, the importance of throughly washing hands, avoiding touching one’s face for the usual several times per hour, and to disinfect frequently used surfaces. An outstanding benefit of gloves is that you become much more aware of when you touch your face or are about to eat a food, such as a sandwich, with your hands.
N95 masks, goggles, and gloves (Preferably doubled) can provide solid protection if properly put on, worn, and taken off. This can be taught to the general public. It comes down to people being focused on what they are doing when they are dealing with PPE. Public self serve drinks and condiments are another source of potential infection.
Although 100% compliance with anti-virus best practices are not likely, if we can get enough people on board to get the r0 below 1, Covid-19 should eventually disappear. Obviously, the more people participate, the sooner Covid-19 disappears.
The last thing we need is reverse zoonosis, where we infect our pets and other animals with Covid-19 and these animals later cause reinfection back to humans.