Vaccines reduce transmission. https://www.medrxiv.org/content/10.1101/2021.12.27.21268278v1 https://www.medrxiv.org/content/10.1101/2021.12.27.21268278v... >

Vaccines reduce transmission. https://www.medrxiv.org/content/10.1101/2021.12.27.21268278v1 https://www.medrxiv.org/content/10.1101/2021.12.27.21268278v... > We found an increased transmission for unvaccinated individuals, and a reduced transmission for booster-vaccinated individuals, compared to fully vaccinated individuals. And their definition of unvaccinated includes partially vaccinated (1-shot) and probably includes recovered individuals. See table 2 for their results which finds that boosters do significantly reduce transmissibility and susceptibility, but it is just very far from the perfect effect everyone would have hoped and wished for. Vaccines are probably still more effective than masking in preventing transmission (given the average person's adherence to masking guidelines) and the effect would intuitively (to me anyway) seem likely to stack.