[vlovich123]

"Remains unclear" is very different from "no impact on transmission rates". Here's the follow-up paper from the same group [1]

> These results suggest that the vaccine is initially effective in reducing infectiousness of breakthrough infections even with the Delta variant, and that while this protectiveness effect declines with time it can be restored, at least temporarily, with a booster vaccine.

The paper you're looking at is analyzing waning immunity against the Delta variant.

[1] https://www.medrxiv.org/content/10.1101/2021.08.29.21262798v...

[hdjjhhvvhga]

> "Remains unclear" is very different from "no impact on transmission rates".

Well, at least within households[0]:

> Research reveals fully vaccinated people are just as likely to pass virus on to those they share a home with

[0] https://www.theguardian.com/world/2021/oct/28/covid-vaccinat...

[pw201]

The first sentence of the article is that it's about "People who are fully vaccinated against Covid yet catch the virus". If the vaccines don't lower P(transmission|infection) but do lower P(infection), then they lower P(infection & transmission) (because that's the product of those two).