A Virus That Makes Humans Stupid? 'Innocuous' Algae Pathogen That Impairs Cognition Discovered

A virus known to attack green algae in lakes and rivers can also infect human brains -- and it's making dummies out of us. The virus, called ATCV-1, can impair cognitive activity, learning and memory, essentially making a person who has the virus less intelligent, researchers in the U.S. have found. Scientists said this is the first time the virus has been observed in people.