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Macaques grow wary of germs after viral outbreaks
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Macaques grow wary of germs after viral outbreaks

So: Japanese macaques that lived through a deadly 2020 outbreak became more cautious about food that looked contaminated, even though the virus did not spread through food or feces. In tests with 55 monkeys, those from outbreak-exposed groups ate food shown beside sealed macaque feces in just 47 percent of trials, compared with 79 percent for monkeys that had not experienced the outbreak. The change was similar in monkeys that got sick and those that stayed healthy, suggesting that witnessing an outbreak may be enough to shape avoidance behavior. The findings offer a fascinating glimpse of the behavioral immune system - and hint that disgust may have deep evolutionary roots.
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