Medical workers test samples to detect Omicron near Tel Aviv, Israel
Xinhua
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A medical worker tests samples in order to detect the new coronavirus variant Omicron in a laboratory in Shamir Medical Center near Tel Aviv, Israel, on Dec. 1, 2021. (Gideon Markowicz/JINI via Xinhua)

A medical worker tests samples in order to detect the new coronavirus variant Omicron in a laboratory in Shamir Medical Center near Tel Aviv, Israel, on Dec. 1, 2021. (Gideon Markowicz/JINI via Xinhua)

A medical worker tests samples in order to detect the new coronavirus variant Omicron in a laboratory in Shamir Medical Center near Tel Aviv, Israel, on Dec. 1, 2021. (Gideon Markowicz/JINI via Xinhua)