Adenovirus remained infectious after crossing species barrier. A class of virus has for the first time been shown to jump from animals to humans — and then to infect other humans. The virus is described in PLoS Pathogens today1. The team that discovered it might also have found the first human to be infected: the primary carer for a colony of titi monkeys (Callicebus cupreus) that suffered an outbreak. The culprit is an adenovirus, one of a class of viruses that cause a range of illnesses in humans, including pneumonia. But this particular strain has never been seen before. It...