If you're wondering how bad Delta really is, even in highly vaccinated SF (76% of >age 12 fully vaxxed) & still w/ a lot of masking (most folks in stores), we're seeing a pretty steep Covid uptick. Daily cases up 4-fold (10->42; Fig L), hospital pts doubled (9->19; R)(Thread 1/4) 
Uptick mirrored @UCSFHospitals: Covid inpatients (we were at ~3 pts two-wks ago) now 13 (Fig L). Overall test positivity rate was well below 1%; it's now up to 2.6% (Fig R). Even more worrisome, test positivity rate in asymptomatic pts was ~0.15%, now up 6-fold to 0.9%. (2/4)
I don't have vaccinated/unvaxxed breakdown for SF & UCSF – I assume most severe cases are in unvaxxed. But even for vaxxed, w/ more Covid in air expect more breakthru cases. As for me, I'm back to double-mask in stores. Still indoor dining but might abort if trends continue.(3/4)
The SF # s are still fairly low, & are cause for caution, not panic. But this kind of uptick in SF (U.S.'s vaccination leader) shows that Delta is very real – the places w/ much lower vax rates may well get clobbered. Alas, doesn't seem like there are many persuadables left.(4/4)
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