Is It Safe to Visit My Grandchildren?
4 min readApr 20, 2021
Misunderstanding COVID vaccine 90% efficacy
By Amy Rogers, MD, PhD
I shared a recent Zoom call with a woman who is fully vaccinated against COVID-19. “Fully vaccinated” means she is at least 14 days past her second dose of one of the mRNA vaccines made by Moderna or Pfizer.