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COVID-19 novelcoronavirus-optimized - Coggle Diagram
COVID-19 
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Vaksin
Pfizer, Astrazaneca, Sinovac
Sejarah
The novel virus was first identified in the Chinese city of Wuhan in December 2019; a lockdown in Wuhan and other cities in surrounding Hubei failed to contain the outbreak, and it quickly spread to other parts of mainland China and around the world.
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