A newly discovered gut virus, crAssphage, probably isn't new at all, it was just discovered. But it's in half the world's population, according to estimates.
A new paper in Nature Communications says crAssphage infects one of the most common types of gut bacteria, Bacteroidetes. This phylum of bacteria is thought to be connected with obesity, diabetes and other gut-related diseases.
Robert A. Edwards, a bioinformatics professor at San Diego State University, and colleagues stumbled upon the discovery while using results from previous studies on gut-inhabiting viruses to screen for new viruses.