Found this to be an interesting article regarding the Provincetown outbreak that seemed to have a big impact in the CDC's new recommendations. Sorry if it's already been posted
https://inguyun.medium.com/the-provincetown-outbreak-is-actually-good-news-if-you-are-vaccinated-93a1edd763b6
"Now, let’s look at the numbers. While Barnstable County overall has a 69% vaccination rate, Provincetown itself is 95% vaccinated. The demographics of the visitors — predominantly liberal gay men, a minority of liberal lesbians, and a further minority of liberal straight folks — is also likely to be close to 95% vaccinated. This was certainly true at the guest house where I stayed, and the one indoor show I attended, where everyone was vaccinated. Unfortunately too many people assumed that it was 100% all the time.
There were 60,000 visitors to Provincetown during the period in question. That would translate to 57,000 vaccinated folks and 3,000 unvaccinated folks.
How many tested positive for Covid? Current reports say about 750 vaccinated folks and 250 unvaccinated.
This means that 750/57000 vaccinated folks tested positive, or 1.3%. 250/3000 unvaccinated folks tested positive, or 8.3%. Being vaccinated gave you a more than 6-fold protection against Covid than being unvaccinated. This is similar to the protection figures published in the early spring of 2021, before the Delta variant had any impact in this country.
What about the hospitalizations? 6 vaccinated cases were hospitalized, out of 950 cases. That’s 0.6% of cases. Historically, 5% of Covid cases have resulted in hospitalization in the US. That’s a nine-fold improvement!"