Los Angeles County health officials and other providers began offering second booster doses of the COVID-19 vaccine to residents 50 older on March 30. This action comes after the U.S. Food and Drug Administration (FDA) authorized a second booster dose of either the Pfizer-BioNTech or the Moderna COVID-19 vaccines for older and immunocompromised individuals on Tuesday. Additionally, the second booster dose of the Pfizer-BioNTech COVID-19 vaccine is authorized by the FDA for individuals over 11 and the Moderna vaccine for individuals over 17 with moderate and severe immunosuppression. The second booster is recommended for eligible individuals at least four months after receiving the first booster dose. “Current evidence suggests some waning of protection over time against serious outcomes from COVID-19 in older and immunocompromised individuals. Based on an analysis of emerging data, a second booster dose of either the Pfizer-BioNTech or Moderna COVID-19 vaccine could help increase protection levels for …