As we are discovering with SARS-CoV-2 being transmitted in aerosol form, the limits of masks and social distancing become apparent. If everyone wears a mask (cl

As we are discovering with SARS-CoV-2 being transmitted in aerosol form, the limits of masks and social distancing become apparent. If everyone wears a mask (cloth, not n95 grade), they emit X number of aerosols. So the longer you're around someone, even masked, the higher the risk. And aerosols can linger for quite a long time in an enclosed setting. Social distancing can help, but limiting how many people are emitting, but neither it nor masks are adequate if a significant portion of the population you're around is shedding virus.