A CVS pharmacist gives the Pfizer/BioNTech COVID-19 vaccine to a resident at the Emerald Court senior living community in Anaheim, Calif., in January. Federal health officials have revised advice on nursing home visitations for the first time since September.

ANAHEIM, CA – JANUARY 08: A CVS pharmacist gives the Pfizer/BioNTech COVID-19 vaccine to a resident at the Emerald Court senior living community in Anaheim, CA on Friday, January 8, 2021. The vaccine was optional for staff and residents. (Photo by Paul Bersebach/MediaNews Group/Orange County Register via Getty Images)