AdvertisementDelta Is Surging. Here's What You Need To Know To Stay SafeUpdated August 04, 2021Allison AubreySelena Simmons-DuffinRob SteinCarmel WrothfacebookEmailPeople 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. (AFP via Getty Images)This article was originally published on July 17, 2021.