08:41California's Covid-19 epidemic has increased in California. This is due to the highly contagious Delta variant. San Francisco and six other California counties have reimposed mask requirements for indoor spaces. This comes less than two months after the region's highly vaccinated experts celebrated what they believed would be a return of normal.Recent days have seen San Francisco's infection rates rise to almost 20 times their level in June. Two hospitals in the city have reported that over 200 employees have tested positive for the virus.
