Scientists injected three different human viruses -- called adenoviruses -- into chickens. The chickens injected with one of the viruses, Ad-37, developed two to three times more body fat than chickens without the viruses, despite having the same diet. However, the chickens' weight didn't differ much in the brief trial.
No humans were studied, so it's not certain if the viruses have the same effect on people.
'The role of adenoviruses in the worldwide epidemic of obesity is a critical question that demands additional research,' write Leah Whigham, PhD, and colleagues."
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