Pfizer CDC suggests Pfizer/BioNTech Covid-19 vaccine booster for children as young as 12 3 years ago On Wednesday, the US Centers for Disease Control and Prevention updated its advice for the Pfizer/BioNTech Covid-19 vaccination booster, allowing… Mix-and-match J&J Covid booster increased immune response after the Pfizer vaccine, according to a research 3 years ago Researchers stated Sunday that using the Johnson & Johnson vaccine as a booster for those who were previously inoculated with…