The fact that nobody's pinpointed the source for the new coronavirus isn't particularly unusual, adds Garry. It can take years to figure out a source; the natural source of the Ebola virus remains a mystery, for example. But he thinks it's out there: "It's just a matter of time before we find the progenitor in a bat or some other species." Ian Lipkin, at the Mailman School of Public Health at Columbia University, is another researcher who's taken a hard look at the genetics of this virus. He says that there's no evidence for human manipulation. In fact, the way the virus infects people is so quirky, he thinks it couldn't have been made in a lab. "We would not have known how to design this virus, even if we had wanted to do so," he says. "When I say 'we,' I really do mean the scientific community, whether we mean scientists in Europe or the U.S. or China, for that matter." But he adds, it is still possible that a scientist in China could have found the coronavirus in nature and that a lab accident ensued.