related_tweet: @jot_au @james00000001 yes, i've been told if you have 2 pfizer, then get moderna as the booster; opposite if you had 2 moderna, and either pfizer or moderna if you had az. 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  novavax is the 3rd vaccine but not approved yet to have as a booster as yet (as far as i know)