Britain detected two cases of the new Omicron coronavirus variant on Saturday, even as Australia and other countries joined nations imposing restrictions on travel from southern Africa in an effort to stop its spread.
Authorities in Germany and the Czech Republic also said they had suspected cases.
The discovery of the variant has sparked global concern, a wave of travel bans or curbs, and a sell-off on financial markets on Friday as investors worried that Omicron could stall a global recovery from the nearly two-year pandemic.
Omicron, dubbed a “variant of concern” by the World Health Organization, is potentially more contagious than previous variants of the disease, although experts do not know yet if it will cause more or less severe COVID-19 compared to other strains.
The variant was first discovered in South Africa and had also since been detected in Belgium, Botswana, Israel, and Hong Kong.
Dutch authorities said that 61 out of around 600 people who arrived in Amsterdam on two flights from South Africa on Friday had tested positive for the coronavirus. Health authorities were carrying out further tests to see if those cases involved the new variant.
One passenger who arrived from South Africa on Friday, Dutch photographer Paula Zimmerman, said she tested negative but was anxious for the days to come, having spent hours on a flight that likely had many infected passengers.
“I’ve been told that they expect that a lot more people will test positive after five days. It’s a little scary the idea that you’ve been in a plane with a lot of people who tested positive,” she said.
Financial markets plunged on Friday, especially stocks of airlines and others in the travel sector, as investors worried the variant could cause another surge in the pandemic. Oil prices tumbled by about $10 a barrel.
The Dow Jones Industrial Average closed down 2.5%, its worst day since late October 2020, and European stocks had their worst day in 17 months.
It could take weeks for scientists to fully understand the variant’s mutations and whether existing vaccines and treatments are effective against it. Omicron is the fifth variant of concern designated by the WHO.
The two linked cases of the new Omicron coronavirus variant detected in Britain were connected to travel to southern Africa, health minister Sajid Javid said.
The health ministry said two individuals and all members of their households were being re-tested and told to self-isolate while further testing and contact tracing were done.
Britain also said it was expanding its “red list” to put travel curbs on more southern African countries, while South Korea, Sri Lanka, Thailand, Oman, and Hungary also announced travel restrictions on southern African nations.
Officials in the western German state of Hesse said the Omicron variant has probably arrived in Germany after mutations were found in a passenger arriving from South Africa. Czech health authorities said they were examining a suspected case of the variant in a person who spent time in Namibia.
Although epidemiologists say travel curbs may be too late to stop Omicron from circulating globally, many countries around the world – including the United States, Brazil, Canada, and European Union nations – announced travel bans or restrictions on southern Africa on Friday.
On Saturday, Australia said it would ban non-citizens who have been in nine southern African countries from entering and will require supervised 14-day quarantines for Australian citizens returning from there.
The new variant has also thrown a spotlight on disparities in how far the world’s population is vaccinated. Even as many developed countries are giving third-dose boosters, less than 7% of people in low-income countries have received their first COVID-19 shot, according to medical and human rights groups.