Kristian Andersen, who studies the

Kristian Andersen, who studies the virus at Scripps Research in La Jolla, California, puts the odds of it being accidentally released by the Wuhan lab at “a million to one,” far less likely than an infection in nature. But virus expert David O’Connor of the University of Wisconsin-Madison said he thinks too little is known to rule out any source, except the idea the virus was man-made. Finding the source is important, he said, because it may harbor the next pandemic virus.