New gut-dwelling virus is surprisingly common

Health effects unknown for crAssphage found in up to three-quarters of people

A newly discovered virus may already be living in your intestines. As many as three-quarters of people carry this virus, yet it has gone unnoticed until now.

“We haven’t been able to capture the little bugger on a plate and take a picture of it,” says computational biologist Robert Edwards of San Diego State University, who led the study.