GENEVA (Xinhua): Although the first clusters of atypical pneumonia were reported in Wuhan, China, it did not necessarily mean that was where the Covid-19 disease crossed from animals into humans, a senior World Health Organization (WHO) expert said on Monday (Aug 3).
Dr Michael Ryan, executive director of the WHO Health Emergencies Programme, said at a routine Coivd-19 briefing on Monday that a more "extensive retrospective epidemiological study" should be taken to fully understand the link between the cases.
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