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> No, it's the other way around. Transmission is correlated with viral load. In the unvaccinated, high viral load leads to early self-observable symptoms. The v
by jjwiseman 5y ago
> No, it's the other way around. Transmission is correlated with viral load. In the unvaccinated, high viral load leads to early self-observable symptoms. The vaccines are designed to suppress symptoms, so a vaccinated person can be infected and transmitting, without knowing they should be isolating.
You're saying, confidently, that vaccinated people spread more COVID than un-vaccinated people? A bold strategy!
It's probably correct that lots of spread is happening because people feel OK, but that's because (especially with Delta) viral load typically peaks before symptoms show up[1]. That is, the most infectious period is probably before anyone feels symptoms, vaccinated or not. But of course the vaccines significantly reduce the chance of getting infected in the first place, and when you directly measure the secondary attack rate, instead of looking at a proxy like RT-PCR Ct, vaccination also seems to significantly lower that[2].
1. "Delta’s rise is fuelled by rampant spread from people who feel fine" https://www.nature.com/articles/d41586-021-02259-2 https://www.nature.com/articles/d41586-021-02259-2
2. "Vaccine effectiveness against SARS-CoV-2 transmission and infections among household and other close contacts of confirmed cases, the Netherlands, February to May 2021" https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.31.2100640 https://www.eurosurveillance.org/content/10.2807/1560-7917.E...