Why are California’s case rates lower than other states who are more vaccinated?

Hmmmm … someone notices that acquired immunity might be a thing and influence the progression of Covid-19:

One clear example is the New England states of Vermont and Maine. Relatively shielded from the worst of the nation’s previous surges, they have struggled against the delta variant, which has sent their case rates soaring.

The two states have higher vaccination rates than California’s, experts say — but lower natural immunity.

As horrific as the winter surge was, with hospitals overwhelmed and death rates hitting pandemic peaks, experts say California emerged from it with a relatively significant amount of natural immunity.

Source: California’s COVID cases are lower than in other states that are more vaccinated. Why?

And:

“Maine is paying the price of not having had big numbers of cases,” said Dr. Shira Doron, an infectious disease physician and hospital epidemiologist at Tufts Medical Center in Boston. “They don’t have natural immunity to help.”

In the U.S., the official position is that natural immunity is not a thing. Oh well.

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