Even though most reported cases of sexually transmitted diseases were down in San Francisco in 2020, Dr. Stephanie Cohen said she is "quite concerned" because the low statistics bely an even more significant decline in testing. "We know that STI testing rates have dramatically declined and it's most likely the decline in testing that is behind the decrease in case counts," Cohen, a straight ally who is the medical director of the Department of Public Health's City Clinic in the South of Market neighborhood, told the Bay Area Reporter, using the acronym for sexually transmitted infections. "It could be a change in behaviors that is decreasing community transmission of STIs, but I am quite concerned, because HIV and STI screening is one of