FACTBOX-Coronavirus variants, first found in UK and South Africa, spread worldwide

* JAPAN detected the variant found in South Africa, the government said, the first such discovery in a nation that has already identified more than a dozen cases of the variant spreading in Britain. * SOUTH KOREA said the variant found in Britain was found in three people who had entered South Korea from London on Dec. 22.

Britain began its third lockdown on Tuesday after Prime Minister Boris Johnson said a coronavirus variant first identified in Britain was spreading so fast it risked overwhelming the National Health Service within 21 days. UK scientists also expressed concern that vaccines being rolled out in Britain may not be able to protect against another variant that emerged in South Africa.

The following countries are among those that have reported variants among their populations. * IRAN on Tuesday registered its first case of a coronavirus variant in a traveller arriving from the United Kingdom.

* The UNITED STATES has reported four cases of the UK variant - in New York, California, Florida and Colorado. * SWITZERLAND has documented five cases of the variant from Britain and two cases of the South African mutation, a health ministry official said.

* DENMARK estimates around 800 peoples have been infected with the variant spreading in Britain. * FRANCE said there were around a dozen cases of the UK variant in the country. Martin Hirsch, director general of the Paris hospitals system, said the variant was present in Paris.

* INDIA has found 38 cases of the variant found in Britain. * JAPAN detected the variant found in South Africa, the government said, the first such discovery in a nation that has already identified more than a dozen cases of the variant spreading in Britain.

* SOUTH KOREA said the variant found in Britain was found in three people who had entered South Korea from London on Dec. 22. Officials vowed to speed up vaccinations. * Self-ruled TAIWAN, claimed by neighbouring China, confirmed its first case of the variant discovered in Britain, a traveller from the UK.

* NORWAY said the variant circulating in Britain had been detected in 23 people, while the variant circulating in South Africa had been detected in one person. * AUSTRIA has found four cases of the coronavirus mutation first detected in Britain and one case of the South African mutation, Franz Allerberger of public health agency AGES told a news conference on Monday.

* AUSTRALIA said two travellers from the United Kingdom were carrying the variant found in Britain. * TURKEY has banned Britons from entering the country after detecting 15 cases of the new variant in travellers from Britain, the government said.

* GREECE has detected four cases of the variant in people who recently travelled from Britain, a Health Ministry official said. * CYPRUS has discovered 12 cases of the variant in people who recently travelled from Britain.

* Health officials in IRELAND said increased socialising around Christmas - and not a new variant - had driven a surge in infections. Prime Minister Micheál Martin said on Wednesday the variant discovered in Britain was spreading in Ireland at a rate that has surpassed the most pessimistic models available to the government. * JORDAN has detected its first two cases of the variant spreading in Britain.

* GERMANY said the variant from Britain had been found in a passenger flying to Frankfurt from London on Dec. 20. It seems to have been present in Germany since November, the Die Welt daily reported. * ITALY detected a patient infected with the variant found in Britain, the health ministry said.

* The variant linked to Britain has been detected on the island of Madeira in PORTUGAL, the regional civil protection authority said. * Health officials in FINLAND said the variant circulating in Britain has been detected in two people, while the variant spreading in South Africa has been detected in one person.

* SWEDEN said the variant circulating in Britain had been detected after a traveller from Britain fell ill on arrival and tested positive. * Officials in CANADA said that two confirmed cases of the variant detected in the United Kingdom had appeared in the Canadian province of Ontario.

* CHILE said it had recorded its first case of the British variant. * BRAZIL confirmed its first two cases of British variant, Sao Paulo state's health secretariat said.

* LEBANON detected its first case of a variant of the coronavirus on a flight arriving from London. * UNITED ARAB EMIRATES discovered a "limited number" of cases of people infected with a new variant, a government official said. Those affected had travelled from abroad, without specifying from where or the number of cases.

* SINGAPORE confirmed its first case of the variant found in Britain, the patient arriving from Britain on Dec. 6, while 11 others who were already in quarantine had returned preliminarily positive results. * ISRAEL detected four cases of the coronavirus emerging in Britain.

* The British variant appears to have infected two students who returned to HONG KONG from the UK, the Department of Health said. * PAKISTAN health officials said the variant found in Britain had been detected in the southern province of Sindh.

* VIETNAM has detected its first case of the variant that is spreading around Britain, the health ministry said.