Do the vaccines have efficacy in limiting disease?
Yes. Unequivocally.
Is it 99%? No. Is it 60%+? Definitely.
That alone tells you unvaccinated people spread more disease.
If you understand how pandemics work, you understand that small reductions in risk early on lead yo large reductions in spread later, because of the exponential spread. That might be a little advanced for ya tho.
Moreover, when someone GETS COVID and is vaccinated,
they tend to clear it more quickly and have a smaller viral load (although studies are conflicting on VL), shortening the period of infectiousness substantially.
In other words, they spread less disease.
This isn’t just speculation.
Vaccination reduces the risk of delta variant infection and accelerates viral clearance. Nonetheless, fully vaccinated individuals with breakthrough infections have peak viral load similar to unvaccinated cases and can efficiently transmit infection in household settings, including to fully...
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