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China is to examine thousands of blood samples taken in 2019 in Wuhan, where Covid-19 is thought to have started, in order to establish how and when the pandemic started.
The samples that will be examined, about 200,000, were taken in Wuhan in 2019 before the virus spread worldwide. These samples have been kept hidden away at the Wuhan Blood Laboratory for the past two years.
A Chinese health official stated with CNN that final preparations are being carried out for the samples to be examined.
The World Health Organisation had declared in February that the samples can be crucial in finding out the truth about how the pandemic had spread.
Various experts are of the opinion the virus infected humans for the first time before December 2019.