COVID-19 vaccine boosters: Who is eligible?
https://healthell.blogspot.com/2021/09/covid-19-vaccine-boosters-who-is.html
COVID-19 vaccine boosters: Who is eligible?

U.S. health authorities’ move last week to authorize and recommend the Pfizer-BioNTech COVID-19 vaccine to certain individuals who received a second dose six months ago has left about 20 million Americans eligible, according to Jeff Zients, White House COVID-19 response coordinator.