Covid vaccines don’t prevent the vaccinated from getting or transmitting Covid, but they supposedly lessen its severity. Looks like that’s out the window now, too. From MedRxiv at medrxiv.com:
This article is a preprint and has not been certified by peer review [what does this mean?]. It reports new medical research that has yet to be evaluated and so should not be used to guide clinical practice.
SARS-CoV-2 variant B.1.617.2 (delta) is associated with higher viral loads  and increased transmissibility relative to other variants, as well as partial escape from polyclonal and monoclonal antibodies . The emergence of the delta variant has been associated with increasing case counts and test-positivity rates, indicative of rapid community spread. Since early July 2021, SARS-CoV-2 cases in the United States have increased coincident with delta SARS-CoV-2 becoming the predominant lineage nationwide . Understanding how and why the virus is spreading in settings where there is high vaccine coverage has important public health implications.