Japan, Israel, the Philippines… These countries close their borders to foreigners.
Since its detection on November 25, 2021 by South Africa, countries have sought the parade against this variant, called Omicron, which presents according to the World Health Organization "an increased risk of reinfection".
The G7 is also urgently bringing together its health ministers in London to study a response to this new threat.
The United States, which had just reopened to the world in early November, is closing its borders to travelers from eight southern African countries.
In Europe, restrictive measures are also starting to be put in place despite vaccination.
In the UK, travelers from overseas must self-isolate on arrival on UK soil and exit with a negative PCR test at least two days after arrival.
Read also Omicron: Europe barricades itself, won by the fear of a "worrying" variant
The laboratories that manufacture the vaccines, AstraZeneca such as Pfizer / BioNTech, Moderna and Novavax have expressed confidence in their ability to combat this new strain of Omicron.
Ursula von der Leyen, the president of the European Commission estimated the time needed for laboratories to determine whether they should adapt their vaccine of "two to three weeks" calling on Sunday to redouble health precautions.