Vaccini, Andrea Crisanti: “The cost / benefit ratio is unfavorable for young people, but without vaccination for young people, herd immunity is not achieved. And to achieve this, a whole series of indications have been disregarded, discrediting the AstraZeneca vaccine” . Then on the second dose with Pfizer or Moderna: “There are no data on heterologous vaccination. And without data, I would not do it. In theory there should be no problems”
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