China has published a short animation titled "Once Upon a Virus" mocking the U.S. response to the new coronavirus using Lego-like figures to represent the two countries.

Washington and Beijing are locked in a war of words over the origins of the disease, which emerged in the Chinese city of Wuhan and has grown into a global pandemic.

U.S. President Donald Trump said on Thursday he was confident the coronavirus may have originated in a Chinese virology lab, but declined to describe the evidence.