Cases of the omicron variant of the coronavirus popped up in countries on opposite sides of the world Sunday and many governments rushed to close their borders even as scientists cautioned that it's not clear if the new variant is more alarming than other versions of the virus.
The variant was identified days ago by researchers in South Africa, and much is still not known about it, including whether it is more contagious, more likely to cause serious illness or more able to evade the protection of vaccines.
But many countries rushed to act, reflecting anxiety about anything that could prolong the pandemic that has killed more than 5 million people.
Israel decided to bar entry to foreigners, and Morocco said it would suspend all incoming flights for two weeks starting Monday — among the most drastic of a growing raft of travel curbs being imposed by nations around the world as they scrambled to slow the variant's spread.
Scientists in several places — from Hong Kong to Europe to North America — have confirmed its presence. The Netherlands reported 13 omicron cases on Sunday, and both Canada and Australia each found two.
Noting that the variant has already been detected in many countries and that closing borders often has limited effect, the World Health Organisation called for frontiers to remain open.
The US plans to ban travel from South Africa and seven other southern African countries starting Monday. “It's going to give us a period of time to enhance our preparedness,” the United States' top infectious diseases expert, Dr. Anthony Fauci, said of the ban on ABC's “This Week.”
Many countries are introducing such bans, though they go against the advice of the WHO, which has warned against any overreaction before the variant is thoroughly studied.
Fauci says it will take approximately two more weeks to have more definitive information on the transmissibility, severity and other characteristics of omicron, according to a statement from the White House.