US President Donald Trump claims he has seen evidence that the coronavirus that causes COVID-19 originated in a Wuhan laboratory.
Speaking at a White House news conference he said China either could not stop spread of the virus, or let it spread.
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He declined to say whether he holds the Chinese President Xi Jinping responsible for what he feels is misinformation.
And Mr Trump said he could not say why he has a high degree of confidence that the virus came from the Wuhan Institute of Virology.