Short-lived common side effects including fever, chills, pain, and headache after mixing AZ with Pfizer vaccine reported in @TheLancet. Immunogenicity results to be reported in June and if mixing is a viable option (likely but assumption needs evidence).

Dr. Barry Dworkin

Medical Mythbusting Commentary for May 13, 2021

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Source:
Mixing Covid-19 vaccines tied to more side effects, early UK data suggests

Reference:
Heterologous prime-boost COVID-19 vaccination: initial reactogenicity data

Related posts:

  1. Pfizer COVID-19 vaccine news is a press release not a study. No raw data to review, limited transparency, basic questions unanswered, 94 cases, and an overreaction focusing on the claim of 90% efficacy. Validated evidence required to justify the hype.
  2. CDC releases study showing that mRNA vaccines perform almost the same in the real world as they did in the lab. Further indications are they prevent disease and its transmission.
  3. Will Covid vaccine mixing be adopted as health policy? They use different delivery systems carrying the genetic instruction set to produce the same spike protein, ergo ongoing studies are evaluating clinical outcomes to determine if assumption is true.
  4. Preprint study evaluated entire Scottish population and calls into question delaying second Covid vaccine dose up to 12 weeks. After first dose it noted a drop in preventing hospitalization from 84% at 5 weeks to 58% after the 7th. And after 16 weeks?