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So much good stuff here! Some random questions/musings:

1. Could the truck driver lung cancer thing be more about second-hand cigarette smoke or something?

2. A lot of the deaths you're talking about disproportionately affect the elderly (and other vulnerable groups). I wish it were standard to talk about QUALYs saved instead of lives saved.

3. Your estimated 5-25% probability of getting sick from a 2000-mile flight sounds quite high to me. But in any case, I'm curious if you have an estimate of how much it helps to wear a mask on planes and in airports yourself.

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1. Perhaps. Or petroleum vapors at gas stations too. Outdoor secondhand smoke is probably at least 1 oom less important than car exhaust but that’s just a guess. Living near a highway is a huge risk factor for asthma and lung cancer.

2. Yes, but this makes it a lot harder to do the math

3. The common disposable surgical mask as commonly used probably reduces your chance of infecting others by 60% and your chance of being infected by 30% according to gpt4

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Petroleum vapors at gas stations would totally count as part of driving risk. And agreed on outdoor second-hand smoke. I guess I was imagining smoke-filled truck stops or something, but I suppose it's been decades since any such indoor smoking. A simpler, more generic theory is that the study tried to control for confounders (truck drivers themselves smoking more is an obvious one) but inevitably failed to fully do so.

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