Donald Trump has threatened fresh trade tariffs against China if it is found to have misled the world over the coronavirus outbreak.
Meanwhile, Beijing has accused the United States of trying to shift blame for its handling of the pandemic at home.
North America correspondent David Lipson reports from Washington.
Read more here: https://www.abc.net.au/news/2020-05-01/donald-trump-confident-coronavirus-originated-in-wuhan-lab/12204108
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