22, local time, on the northern Italian city wastewater samples detected in December last year will be coronavirusRNA fragments, the who health emergency project director Michael Ryan said, this is an important discovery, need further research, likely will be coronavirus in December last year has been spread in northern Italy, and didn’t realize it.
The question is to what extent the virus was present in the local environment before an imported case appeared, and what role it played in the spread of the epidemic into the community.

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