COVID vaccines do indeed prevent transmission of the SARS-CoV-2 virus.
Breakthrough COVID-19 Disease
You should get vaccinated, even after you have already had COVID.
The Delta variant is causing SARS-CoV-2 cases to surge, especially in folks who are unvaccinated.
It is not true that 60% of new COVID-19 patients have been vaccinated, but it is possible that some docs have been telling that to Harvey Risch, as it is almost certainly what he would like to hear.