China and the US are sparring over the origin of the coronavirus pandemic. A Chinese official promoted a conspiracy theory that the US army brought the virus to Wuhan, without evidence. This contradicts China's initial assessment that the seafood market in Wuhan was the source. While the exact origin is still unclear, scientists believe the virus jumped from an animal to humans in Wuhan in December 2019. The US calls it the "Wuhan virus", angering China and WHO warns against naming diseases in a way that discriminates.