Between reinstated mask mandates and spiking coronavirus case numbers, this summer is starting to feel a little too much like 2020. … Andrew Noymer, an [epidemiologist and associate professor of population health and disease prevention] at the University of California, Irvine, employed a very California analogy to explain it to me: “Delta is a lightning strike and loosening restrictions is the wind” — and they have joined forces to create a threat like a dangerous wildfire.
Why Covid took off in California, again
The New York Times, Aug. 4, 2021
August 4, 2021