People enjoy an outdoor art exhibition in downtown Los Angeles in early July. Los Angeles County public health authorities are now urging unvaccinated and vaccinated people alike to wear face coverings in public indoor spaces because of the growing threat posed by the more contagious delta variant of the coronavirus.

People wearing face masks walk past a sign reading “Freedom,” part of the decor for the month-long “Portraits of Freedom: Building a Life in L.A.” outdoor art exhibition in downtown Los Angeles, on July 1, 2021, in celebration of the July 4 Independence Day holiday. – Los Angeles County public health authorities are urging unvaccinated and vaccinated people alike to wear face coverings inside restaurants, stores and other public indoor spaces because of the growing threat posed by the more contagious delta variant of the novel coronavirus. (Photo by Robyn Beck / AFP) (Photo by ROBYN BECK/AFP via Getty Images)

A medical assistant administers a coronavirus test to a person at Sameday Testing in Los Angeles this week.