Was the new coronavirus accidentally released from a Wuhan lab? It’s doubtful.

President Trump isn’t the only one hearing this tale. The political world, Internet theorists, intelligence analysts and global public health officials are abuzz with a big question: Is it possible that the new coronavirus — which causes covid-19 — leaked from a lab?

For months, Chinese authorities have pointed to the Huanan Seafood Wholesale Market in Wuhan as the virus’s likely origin. A cluster of early cases had contact with the market. It sold a wide variety of wildlife that, officials hypothesized, was critical to the virus’s formation and spread. Severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS), which cause similar symptoms, were formed after a coronavirus from a bat transformed in another animal and then jumped to humans.