***It would appear that the CDC has now released the data they claim they used to make their revisions to the masking guidance for the vaccinated.
In looking it over, I have some concerns (for whatever my concerns are worth, not working as a professional in that field, but having some understanding of statistics from a business intelligence background and reasonable grasp on how to interpret data) with some of the logic and methodologies behind their reasoning for their conclusion and guidance change.
Outbreak of SARS-CoV-2 Infections, including COVID-19 ...
It would seem like using a popular large-gathering hotspot, over a major holiday weekend (and the outcomes that followed), and trying to apply that to "normal everyday life" may be falling into the realm of "extrapolating the exception"
Basically what this is showing is that, in a popular tourist area, that had thousand and thousands of people present for numerous large holiday gatherings, and being in close contact with each other.
Across those thousands of people and multiple large gatherings
469 people caught covid
346 were fully vaccinated (which doesn't skew far off the vaccinated vs. unvaccinated rate for the state which is near 70%)
Of the vaccinated people, 70% were symptomatic
Only 4 vaccinated had symptoms severe enough to require hospitalization (and 2 of them had underlying conditions)
No deaths reported
Even if not controlling for the fact that it was a popular holiday destination during a popular July holiday season, those numbers still don't suggest anything overly ominous.
When you take into account that not every city in America is as gathering prone as Cape Cod over the 4th of July holiday week, the numbers look even better with regards to the levels of vaccine efficacy and protection one should expect under normal "go to the store, hang out with a small group" types of normal every day life.
If thousands of people (well over half of whom were vaccinated) flocking to a popular destination for a holiday (with lots of large gatherings, bar hopping, lots of 'partying with strangers') only produced 342 mild cases among vaccinated, 4 hospitalizations (2 of which had previous conditions), and no deaths...
That means the vaccine provided lots of robust protection for thousands of people during that holiday week (despite lots of gatherings, being in close contact with strangers, bars, etc...)
Basically, partying in Cape Cod, unmasked, during a time when it's packed is the kind of thing you would do if you wanted to all-but-guarantee you would get sick prior to vaccines being available... the fact that among the vaccinated people, the numbers were a low as they were after that, is actually a testament to Pfizer and Moderna.