Here's what you should know: At this time, additional (3 rd) immunization of the Pfizer-BioNTech COVID-19 vaccine is recommended for any and all individuals who have completed their primary series of Pfizer-BioNTech or Moderna COVID-19 vaccine at least six months ago and (1) who are 65 years or older; (2) who are 18 years or older and are residents in long term care settings; (3) who are 18 ....