You’re going to need roughly 95%

Delta is that infectious, no where in the country is 95% immune. Note, this does not include just the vaccinated, it also includes people who had a severe enough infection to trigger the production of memory b & t cells, not everyone who contracts Covid does this and we don’t have a great way to measure it which is why you don’t see public health officials mentioning it but it’s probably at least a majority of people who contract Covid. Even though the numbers in NE are high right now I can tell you that it’s not overwhelming their hospitals (the news in NH just reported that one hospital had to divert for 4 hours) and they seem to be peaking. Hardly the catastrophe FL experienced a few months ago. Just because at this snapshot they are currently “the worst in the country” doesn’t mean much, especially since most other places besides the Midwest and NE have completed their delta surge while this area is at its peak or just past it.

The New England area has been realitively untouched by Covid due to their adoption of stricter protocols and it’s more rural population (it’s pretty much the only blue/purple rural area in the country.) Therefore they aren’t at 95% despite having a really good vaccination rate. The area that probably closest is California. While they have a slightly lower vaccination rate then New England they have suffered from a very large alpha and delta surge such that they are much much closer to that 95%. Their delta surge was already muted, with it peaking lower and lasting for less time then places like Florida. I would not be surprised to see California be realitively spared from further waves in the future. The rest of the country probably needs at least 2 more waves to get to that point, which is why public health officials are expecting Covid to become endemic by winter 2022. Between a few more waves and kids getting vaxxed we should hit 95% immunity by then.