Countries around the world are racing to introduce travel bans and restrictions on southern African countries in an effort to contain a new variant of Covid-19, called Omicron.
The moves come after the variant was officially named by health officials.
The World Health Organization says early evidence suggests Omicron has an increased re-infection risk.
Meanwhile, hundreds of passengers arriving in Amsterdam from South Africa were tested for the new variant.
Some 61 people on two KLM flights tested positive for Covid-19 and have been quarantined at a hotel near the airport while they have further tests.
The Netherlands is currently struggling with a record-breaking surge in cases.
An extended partial lockdown comes into force there on Sunday evening.
The new Omicron variant was first reported to the World Health Organization from South Africa on 24 November.
It has also been identified in Botswana, Belgium, Hong Kong and Israel.
More suspected cases were reported in Germany and the Czech Republic today.
A host of countries have announced restrictions, including Sri Lanka, the United States, the United Kingdom, Australia, Japan, India, Iran, Brazil, Canada, and Thailand.
The WHO said the number of cases of this variant, initially named B.1.1.529, appeared to be increasing in almost all of South Africa’s provinces.
The WHO said it would take a few weeks to understand the impact of the new variant, as scientists worked to determine how transmissible it was.