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by Sarah Boseley, Hannah Devlin and Martin Belam
Feb 12, 2020
3 minutes
What is Covid-19 - the virus causing the illness that started in Wuhan?
It is a member of the coronavirus family that has never been encountered before. Like other coronaviruses, it has come from animals. Many of those initially infected either worked or frequently shopped in the Huanan seafood wholesale market in the centre of the Chinese city, which also sold live and newly slaughtered animals.
Have there been other coronaviruses?
New and troubling viruses usually originate in animal hosts. Ebola and flu are other examples, and severe acute
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