Yesterday, the FDA authorized a second COVID-19 booster dose for Americans ages 50 and older, along with some immunocompromised individuals, at least four months after their initial booster. The CDC later added its recommendation and said it would include the FDA’s action in its vaccine guidance. See the agency’s announcement here – Coronavirus (COVID-19) Update: FDA Authorizes Second Booster Dose of Two COVID-19 Vaccines for Older and Immunocompromised Individuals | FDA