The spread of infection through faeces and urine has been recognised as an additional mode of transmission...
San Francisco is doomed. Their own poor policies, practices, and decisions are going to come back to haunt them. The part that really makes me angry though is they'll expect the Federal Government to step in and help them clean up and recover from their own poor decisions. We'll end up paying for their choices. 'eff San-Fran, this is going to be a problem of their own making. I'll bet you other cleaner cities will have no trouble controlling or at least drastically limiting the spread of the infection.
During the SARS outbreak one fart plume infected 62 people. COVID19 Type L seems to be related in that respect ...