But a new preliminary study by South African researchers suggests it is three times more likely to cause reinfections compared to the Delta or Beta strains, the first epidemiological evidence about Omicron’s ability to evade immunity from prior infection.
The paper, which has not yet been peer reviewed, was praised by Michael Head, a scientist at the University of Southampton.
“This analysis does look very concerning, with immunity from previous infections being relatively easily bypassed. Might this all still be a ‘false alarm’? That is looking less and less likely,” he said.
Face masks will be mandatory in public transport, shopping centres, shops and taxis when social distancing is not possible. People will have to work from home if possible, and the number allowed to gather at indoor private events will be limited to 100
The variant’s detection and spread represent a fresh challenge to global efforts to battle the pandemic, with several nations already reimposing restrictions many had hoped were a thing of the past.
In Berlin, outgoing German Chancellor Angela Merkel announced that large parts of public life in Germany would be shut off to people who have not been vaccinated or have not recovered from Covid-19, in an attempt to clamp down on surging infection rates fuelled by the Delta variant.
“Culture and leisure nationwide will be open only to those who have been vaccinated or recovered,” Merkel said. The German parliament is due to vote on mandatory immunisations.
It is not yet clear when the latest measures will go into effect.
But the plans include a blanket ban on entering bars, restaurants and cinemas for anyone who is unvaccinated or not recovered from Covid, according to a document signed off by leaders.
The agreement also includes new restrictions on large gatherings -- which would affect events such as Bundesliga football matches -- and the closure of nightclubs in areas with a weekly incidence rate above 350 infections per 100,000 people.
Fireworks will be banned on New Year’s Eve to stop large crowds from gathering, according to North Rhine-Westphalia state premier Hendrik Wuest.
In the United States, Biden urged political opponents to put aside their differences and back his winter plan, with new testing requirements for travellers and a surge in vaccination efforts.
“It’s a plan that I think should unite us,” Biden said. All incoming travellers will need to test negative within a day before their flight, and rapid tests that currently cost $25 will be covered by insurance and distributed free to the uninsured.
His speech came as the United States confirmed eight total Omicron cases -- at least one involving a person with no recent international travel history, signalling the strain is already circulating inside the country.
On Thursday, Norway introduced new anti-Covid measures in greater Oslo after a suspected cluster of Omicron cases emerged among dozens of vaccinated people who attended a Christmas dinner last week. So far, one Omicron case in the cluster has been confirmed.
Face masks will be mandatory in public transport, shopping centres, shops and taxis when social distancing is not possible. People will have to work from home if possible, and the number allowed to gather at indoor private events will be limited to 100, the government said.
Rising Delta infections had already seen European governments reintroduce mandatory mask-wearing, social distancing measures, curfews or lockdowns in a desperate attempt to limit hospitalisations, leaving businesses fearing another grim Christmas.
India has yet to impose new blanket international travel bans, but earlier this week, its health ministry ordered all inbound travellers from “countries at-risk” to undergo mandatory post-arrival Covid testing, along with the random testing of other international arrivals.
WHO chief Tedros Adhanom Ghebreyesus has warned of a “toxic mix” of low vaccination and testing rates creating a “recipe for breeding and amplifying variants”.
In Belgium, Health Minister Frank Vandenbroucke spoke of “chaos” in Flemish schools as cases soared and the country’s leading region Flanders called for new measures.
The United Nations said Thursday that the pandemic has pushed 20 million more people into poverty, estimating that 274 million people would need emergency assistance next year, up 17 per cent on 2021, as economies suffer with Covid-19 restrictions.