Unknowns of the new virus make global quarantines a struggle

[ahlam1399]

Halting the spread of a new virus that has killed hundreds in China is difficult in part because important details about the illness and how it spreads are still unknown

أكثر... (https://abcnews.go.com/Health/wireStory/unknowns-virus-make-global-quarantines-struggle-68766953)