Omicron, a new COVID strain, classified as a 'Variant of Concern.'
The new COVID-19 variant, first found in South Africa this week, has been designated as a “Variant of Concern" by the W.H.O
It had a large number of mutations, and early evidence suggested an increased reinfection risk, according to WHO
It was first reported to the WHO from South Africa on 24 November, and has also been identified in Botswana, Belgium, Hong Kong and Israel.
Travellers from South Africa, Namibia, Zimbabwe, Botswana, Lesotho and Eswatini will not be able to enter the UK unless they are UK or Irish nationals, or UK residents..
Brazil, Australia and U.S has also imposed restriction for the people of infected country mirroring the U.K move.
WHO said the number of cases of this variant, initially named B.1.1.529, appeared to be increasing in almost all of South Africa's provinces.
Professor James Naismith, a structural biologist from the University of Oxford, said: "It is bad news but it's not doomsday."
The US pharmaceutical company Moderna said "it will develop a booster shot against the new Omicron variant of the coronavirus".
Pfizer and BioNTech said that they are not sure whether their vaccines would work against new COVID-19 variant 'Omicron'.