Abstract:COVID 19 is a contagious disease caused by a newly discovered type of coronavirus that has become a pandemic. The new virus and the disease it causes were not known before the outbreak in Wuhan, China, in December 2019. The virus which was later named Covid 19 spread throughout the world. Until now, the virus, which was originally transmitted from wild animals to humans, has infected millions of people in as many as 60 countries. Several types of coronavirus are known to cause respiratory infections in humans … Show more
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