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Depending on how it spreads, the virus could appear to be more common in populations where there has been historic starvation, because it seems like it would he

• VLM 10y ago
  And the flip side of the coin is it would cause extreme obesity if by some economic miracle carb intake were totally unlimited and trended toward infinity. So it would eventually (on a very long scale) be bred out of economic areas of infinite carb availability. But eventually is far too long and too much human suffering, so temporarily we're very very fat. As a hypothesis you could create a mathematical model where the faster a country industrializes or otherwise moves beyond bare subsistence and periodic famine, the harder the spike of obesity. That's not a bad match to existing obesity maps, especially when the obesity map is corrected for country of origin not current geographic location.