FREDERIC J. BROWN
Elton Jackson, 80, looks on as he receives his COVID-19 vaccine, administered by Kathryne Acuna, director of Ambulatory Clinical Services at Kaiser Permanente, on Feb. 5, the opening day of a large-scale vaccination site at a parking structure at Cal Poly Pomona University in Pomona, California. The elderly are among those given priority during the vaccine rollout across the country.

However, some states have shifted from the CDC’s national guidelines due to local epidemiology and demand.