(Expond COVID 19 )and (Expond W.H.O)please explain this please
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COVID-19 is an infectious disease caused by a newly discovered strain of coronavirus, a type of virus known to cause respiratory infections in humans. This new strain was unknown before December 2019, when an outbreak of a pneumonia of unidentified cause emerged in Wuhan, China.Sep 4, 2020
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COVID 19 -CORONA VIRUS DISEASE 2019
W. H. O-WORLD HEALTH ORGANIZATION
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