The Pfizer Covid-19 vaccine is prepared for administration at a vaccination clinic for homeless people, hosted by the Los Angeles County Department of Public Health and United Way on September 22, 2021 in Los Angeles, California. - Covid-related hospitalizations across Los Angeles County fell below 1,000 for the first time since late-July as a steady decline continues from a mid-August peak of nearly 1,800. (Photo by Frederic J. BROWN / AFP) (Photo by FREDERIC J. BROWN/AFP via Getty Images)