… Monkeypox, which causes a rash and fever and is fatal in a very small percentage of cases, isn’t nearly as transmissible as Covid-19. But unlike the novel coronavirus, it spreads easily to and from certain animal populations — rodents in particular. If the pox currently circulating in the U.S. spreads to rats, hamsters, or gerbils, and becomes endemic in those species, there might be no easy way to contain it. “I do share the other scientists’ concern of containment and the virus becoming endemic in our U.S. rodent population,” sys Stephanie James, the head of a viral testing lab...