What should your #seconddose of #covidvaccine be if 1st was AZ? Factors include wait-time/availability, Delta variant prevalence, occupational risks, and study evidence. Answer seems to leaning to Pfizer or Moderna as 2nd dose of choice.

Medical Mythbusting Commentary for June 14, 2021

Source:
Ontario shortens wait between AstraZeneca doses from 12 to 8 weeks
Mix-and-match COVID vaccines trigger potent immune response