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henjin's avatar

If your histogram of survival time by brand, the reason why the first few bars are lower for Moderna than Pfizer is probably because the average date of the first dose is 2021-04-14 for Pfizer but 2021-06-11 for Moderna. Pfizer vaccines were more commonly given in the first two months of 2021 when there was a rapidly decreasing trend in the background mortality rate because the COVID wave in the winter of 2020-2021 was passing by: sars2.net/connecticut.html#Deaths_by_weeks_since_vaccination.

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cm27874's avatar

If someone got Pfizer or Moderna after J&J (because J&J was single-dose, and later considered insufficient by out overlords), would that count as 1st dose Pfizer/Moderna?

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