Submission + - Virus Stole a Human Gene and Won't Let Go of It (nytimes.com)
The molluscum contagiosum virus, which causes sores on skin, swiped a gene from humans about 100,000 years ago according to a new study.
The way that viruses replicate makes them particularly good at thieving DNA. The viruses infect a cell, then co-opt its machinery by injecting their own genes. Sometimes this process goes awry, and a stretch of the host’s DNA gets bundled into the new viral genes. This molecular error can pose a threat to human health.