Nearly three dozen people have been sickened by a new virus spreading in China — with scientists warning it is too early to tell if it is deadly or spreads among humans. The Langya henipavirus — or LayV — appears to be jumping from animals in parts of China, nearly three years after the coronavirus pandemic started there. It belongs to a family of viruses that “are known to infect humans and cause fatal disease,” a Chinese-led team of international scientists wrote in a peer-reviewed study in the New England Journal of Medicine. That includes the Nipah virus, which spreads...