Booster
FDA authorized the use of a heterologous or mix and match booster. This means that Pfizer-BioNTech COVID-19 vaccine recipients falling into one of the authorized categories for boosters may receive the Moderna COVID-19 Vaccine which is a half dose, Pfizer-BioNTech COVID-19 Vaccine or Janssen COVID-19 Vaccine. The booster should be administed at least six months after completing the primary vaccination.https://www.fda.gov/emergency-preparedness-and-response/coronavirus-disease-2019-covid-19/comirnaty-and-pfizer-biontech-covid-19-vaccine
Forti Publications 