newyorkvol
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Let's not needlessly complicate this. I'm just interested in the math.
Posted this link previously….
Effectiveness of COVID-19 Vaccines in Preventing SARS-CoV-2...
“The VE point estimates declined from 91% before predominance of the SARS-CoV-2 Delta variant to 66% since the SARS-CoV-2 Delta variant became predominant.”
There may be some confounding factors, but the effectiveness is nonetheless diminishing