Covid-19 exacerbating US-China tensions

China has reported just one new case of Covid-19 and no new deaths. Meanwhile, the World Health Organization said Monday that Washington had provided no evidence to support "speculative" claims by the US president that the new coronavirus originated in a Chinese lab. Rana Mitter, director of the University of Oxford China Centre, says Covid-19 is exacerbating tensions in the US and China relationship.