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IcaroRibeiro said:

I'm getting my first shot next Saturday, probably gonna be AstraZeneca or Pfizer, but there are chances for Coronovac and Janssen. Cases overall are down, first shots are progressing quickly, but people not coming back for the second one is concerning 

Is there any reason not to come back for a second shot? I can imagine concerns for not getting the vaccine at all, yet why only one shot?