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Originally Posted by Velvet
I looked at the whole article but I can’t see anywhere the question I am looking for. Which is how much does the effectiveness of the phizer or moderna vaccine drop over time against the same variant? Somewhere I read about 6% decline each month or more after the 4 or 5th month of full immunization - I wish I saved the article. That way we could each individually estimate how safe we still might be after our vaccination.
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Good question, the abstract says they look at over 50 thousand individuals, half vaccinated and half not, from January to July 2021, so you probably have a good mix of months from vaccination. Abstract does state that they record date of vaccination for each participant so perhaps this info is in the paper somewhere. Here is a link to the full study, let us know if you find anything.
Comparison of two highly-effective mRNA vaccines for COVID-19 during periods of Alpha and Delta variant prevalence | medRxiv