“Omicron’s very emergency is another reminder that although many of us think we are done with Covid-19, it is not done with us,” he said.
Cases have already been reported in a number of countries including Canada, the UK, Portugal, Belgium and the Netherlands.
The new variant has prompted the UK, EU and US to issue a travel ban on Southern African countries – a decision criticised by South Africa’s President Cyril Ramaphosa.
Japan has announced it is closing its borders to new foreign visitors from midnight on Tuesday, while Australia has paused its long-awaited plan to ease border restrictions.
Travel into Australia for international students and “skilled workers” holding visas was meant to re-start on Wednesday but has now been delayed until 15 December.
Israel has also banned foreigners from entering the country.
(Read more at:- https://www.bbc.com/news/world-59468155)