Cary:

Quote:

...the Diamond Princess, where only 20% ever got sick.

I wonder if the Diamond Princess is really quite the perfect natural experiment as it seems, at least in one specific respect. Being a cruise, I imagine it is possible that a large portion of the passengers got heavy doses of natural vitamin D that they normally wouldn't get when not on vacation. That may have boosted their innate immunities and saved many of them from infection.

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I will have NO survivor's guilt, except a bit of shame for all my Schadenfreude.