the vaccine did not reduce viral load when delta became prevalent, this was mainstream news in August of 2021 https://www.ucdavis.edu/health/covid-19/news/viral-loads-similar-between-vaccinated-and-unvaccinated-people

and yes there are literally millions of instances where they claimed it reduced infection https://thehill.com/homenews/sunday-talk-shows/553773-fauci-vaccinated-people-become-dead-ends-for-the-coronavirus/