I continue to check my little dashboard of San Francisco COVID-19 numbers each day to decide whether swapping air with strangers for inessential activities is probably-fine or probably going to lead to embarrassing questions a la "It wasn't even your favorite taqueria?" The last time I blogged about it, it was good news: all three numbers I track were in the pretty-safe zone. Alas, that's no longer the case. Overall, things still look pretty safe. But in San Francisco, the % of tests coming by positive has been high lately.
There hasn't been a surge of newly-reported cases. It's just that fewer people have been getting these fancy-pants PCR tests lately. Like, on May 28, there were just 35 new cases reported in San Francisco; but that was 1/8 of the tests administered that day. Nobody really thinks that 1/8 of San Franciscans is walking around with COVID. At least, nobody thinks that after they look at the COVID-traces-in-wastewater data, which is staying nice and low.