By ROB GILLIES
TORONTO (AP) — Canada is banning foreign nationals from three more countries because of concerns with the omicron COVID-19 variant and all air travelers coming to the country apart from the United States will have to be tested for COVID-19 upon arrival and will have to isolate themselves until they get the results of their test. Health Minister Jean-Yves Duclos says Canada is banning all foreign nationals who have travelled through Nigeria, Malawi. Canada already announced a ban on foreign nationals from seven countries in southern Africa. Canadians who have visited the 10 countries will have to be tested and quarantine.