Canada on Thursday expanded enhanced screening and monitoring measures to travellers arriving from South Africa, citing the rise of a more infectious variant of Covid-19 in South Africa, similar to one that has emerged in the United Kingdom, Reuters reports.

This follows a move by Prime Minister Justin Trudeau to extend to Jan 6 a ban on passenger flights arriving from Britain, citing the variant. Canada also announced added screening for travellers from Britain.

No cases of the variant have been found in Canada so far, Health Canada said in a release, noting it had tested over 25,000 samples.

“All travellers who have been in the United Kingdom or South Africa within the period of 14 days before the day on which they seek entry into Canada will be subject to secondary screening and enhanced measures,” Health Canada said. Those measures include “increased scrutiny of quarantine plans,” it said.

Canada also updated travel advisories for both the United Kingdom and South Africa to advise extra caution. Health officials continue to advise against all non-essential international travel.