Vaccination is the most likely explanation, and there's a very good biological reason to expect it to be the reason: viral load decreases much more rapidly in v

Vaccination is the most likely explanation, and there's a very good biological reason to expect it to be the reason: viral load decreases much more rapidly in vaccinated people, meaning they're likely infectious for a much shorter time window. There's more more and more research that strongly points to transmission by vaccinated people who get infected (which, remember, is much less likely) being substantially lower than transmission by unvaccinated people. This study [1] came out just last week, for example: > Our study showed that the COVID-19 vaccines not only protect the vaccinee against SARS-CoV-2 infection, but also offer protection against transmission to close contacts after completing the full schedule. This study finds an even stronger reduction (70%) in transmission by fully vaccinated people. The first study that I posted primarily studied partially vaccinated people. 1. https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2021.26.31.2100640 https://www.eurosurveillance.org/content/10.2807/1560-7917.E...