“much of California let its guard down. While the state, and the Bay Area in particular, was among the first in the US to embrace a shelter-at-home order, parts of California have since relaxed or outright halted those measures, letting the coronavirus creep in bit by bit. Meanwhile, precautions against Covid-19 have been inconsistently adopted by the public and businesses — especially as some of the recommended practices, such as wearing a mask, have become politicized.
At the same time, the state has seen major outbreaks in nursing homes, in prisons, and among migrant workers — many of whom are deemed “essential” and are therefore forced to work — that have driven up coronavirus cases further, simultaneously planting seeds for broader community outbreaks.”
https://www.vox.com/future-perfect/2020/7/6/21308351/california-coronavirus-pandemic-covid-outbreak