Vidcast:  https://youtu.be/LPhvY3s9wJM

 

Delivering the second dose of the Moderna or Pfizer mRNA vaccines after 3, 4, or 6 months rather than after only 3-4 weeks is a winning public health strategy.  Epidemiologists at Canada’s University of Toronto draw these conclusion from an age-stratified mathematical model.

 

Second dose delays reduce symptomatic cases by up to 19%, hospitalizations by 14%, and deaths by 10%.  The greatest benefits accrue by delaying that second dose up to 6 months.

 

Other studies show strong protective immunity 3-4 weeks after that first mRNA dose.  Using those second doses to protect more people sooner will stop viral spread and variant evolution.

 

https://www.medrxiv.org/content/10.1101/2021.04.07.21255094v1.full.pdf+html

 

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