CANADA has expanded enhanced screening and monitoring measures to travelers arriving from South Africa, citing the rise of a more infectious variant of COVID-19 in that country, similar to one that has emerged in the United Kingdom. This follows a move on Wednesday by Prime Minister Justin Trudeau to extend to January 6 a ban on passenger flights arriving from Britain, citing the variant. It also announced added screening for travellers, from Britain. Canadian Prime Minister Justin Trudeau on AI and Quantum Computing. No cases of the variant have been found in Canada so far, Health Canada said in a…