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No, even by the time of Delta it was clear the efficacy against infection was marginal at best. The CDC acknowledged this in its Provincetown study in late July 2021 and recommended the reimposition of mask mandates as a result.

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The Provincetown study does not say that, it says that people who do get infected likely carry a similar viral load regardless of vaccination status, which was a reversal from what was seen in the initial strain. This represented an increased risk of transmission on its own that they felt warranted an increase in precaution.

> data from this report are insufficient to draw conclusions about the effectiveness of COVID-19 vaccines against SARS-CoV-2, including the Delta variant, during this outbreak.

https://www.cdc.gov/mmwr/volumes/70/wr/mm7031e2.htm?s_cid=mm...

too lazy to look it up right now but VE against infection was around 60-80% within 4 months of taking the shot

If there was any substance whatsoever to these sorts of numbers then highly vaxxed jurisdictions would show significantly better case rates, and they absolutely do not.

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