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If this these extremely common viruses were the root cause of obesity, then why does obesity affect different countries so differently?

Viruses all passed around globally so you have to assume all developed countries are getting pretty much the same level of population infection.

Maybe it's because if certain viruses do play a role in obesity, it sounds like an evolved adaptation in humans. Ie, if you're sick, you respond by burning less energy and storing more of it as fat.

Like all evolved adaptations, they don't affect all populations equally. I'm guessing if ad36 contributes to obesity, you must first be genetically predisposed to it happening.



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