TEN years? Some of us are not apt to last that long, if so, just in the normal flow of things.
Just realizing (regretfully) that AFAIK they haven't studied the population of people who never get sick despite their "viral load" and ample exposure.
They must be out there! Unless their relative safety is genetic (hence hard to mimic in the vulnerable population), I'd have thought that would be the clearest path to finding ways to protect the rest of us.
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The most dangerous word in the language is "obvious"