BRITAIN-LONDON-COVID-19-OMICRON

BRITAIN-LONDON-COVID-19-OMICRON

(220129) -- LONDON, Jan. 29, 2022 (Xinhua) -- People walk past a COVID-19 vaccination center in Brent, northwest London, Britain, on Jan. 28, 2022. A new form of Omicron named BA.2 has been designated a "variant under investigation," with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday. (Photo by Ray Tang/Xinhua)

BRITAIN-LONDON-COVID-19-OMICRON

BRITAIN-LONDON-COVID-19-OMICRON

(220129) -- LONDON, Jan. 29, 2022 (Xinhua) -- Photo taken on Jan. 28, 2022 shows a woman walking past ambulances parked outside the Royal London Hospital in London, Britain. A new form of Omicron named BA.2 has been designated a "variant under investigation," with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday. (Photo by Ray Tang/Xinhua)

BRITAIN-LONDON-COVID-19-OMICRON

BRITAIN-LONDON-COVID-19-OMICRON

(220129) -- LONDON, Jan. 29, 2022 (Xinhua) -- People walk past a COVID-19 vaccination center in Brent, northwest London, Britain, on Jan. 28, 2022. A new form of Omicron named BA.2 has been designated a "variant under investigation," with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday. (Photo by Ray Tang/Xinhua)

BRITAIN-LONDON-COVID-19-OMICRON

BRITAIN-LONDON-COVID-19-OMICRON

(220129) -- LONDON, Jan. 29, 2022 (Xinhua) -- Photo taken on Jan. 28, 2022 shows ambulances parked outside the Royal London Hospital in London, Britain. A new form of Omicron named BA.2 has been designated a "variant under investigation," with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday. (Photo by Ray Tang/Xinhua)

BRITAIN-LONDON-COVID-19-OMICRON

BRITAIN-LONDON-COVID-19-OMICRON

(220129) -- LONDON, Jan. 29, 2022 (Xinhua) -- Photo taken on Jan. 28, 2022 shows ambulances parked outside the Royal London Hospital in London, Britain. A new form of Omicron named BA.2 has been designated a "variant under investigation," with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday. (Photo by Ray Tang/Xinhua)

BRITAIN-LONDON-COVID-19-OMICRON

BRITAIN-LONDON-COVID-19-OMICRON

(220129) -- LONDON, Jan. 29, 2022 (Xinhua) -- A woman walks past a COVID-19 vaccination center in Brent, northwest London, Britain, on Jan. 28, 2022. A new form of Omicron named BA.2 has been designated a "variant under investigation," with 426 cases of the Omicron variant sub-lineage confirmed in the United Kingdom (UK), the UK Health Security Agency (UKHSA) said Friday. (Photo by Ray Tang/Xinhua)