We don't ignore it.So most of you just choose to ignore the fact that vaccination does not actually stop the chain of transmission?
Vaccinated, once infected with delta have been shown to be as infectious. Benefits are - infection is cleared faster once it becomes systemic (spreads past upper respiratory tract). So clearly much of the benefit of getting vaccinated is for the individual.
With the original virus, vaccination did stop the chain of transmission by quickly neutralizing the virus with active antibodies for about 6 months but immunity is more than antibodies. Vaccination won't 'stop' Delta transmission but it reduces with other countermeasures the Rt to below 1 to curb the spread of the virus into a manageable condition instead of a exponential explosion of new cases.
https://epiforecasts.io/covid/posts/national/united-states/
https://delphi.cmu.edu/covidcast/summary/?date=20211103


