including canada. some experts say it could already be in the u.s., undetected. carley: marianne rafferty has more on this breaking news this morning. good morning, marianne. reporter: good morning. carley and todd. president biden holding an emergency meeting last night on the new covid omicron variant as two cases are confirmed in canada. the health team says they need another two weeks to gather data on the variant. a u.s. travel ban on eight african nations that s. takes effecttoday. nearly a dozen countries confirming cases of omicron and experts say the travel ban won t stop the variant from reaching the u.s. it s almost definitely here already, looking at the number of cases coming off planes this weekend. it s almost a certainty that cases have gotten into the united states. reporter: health officials say there s no reason to fear the vaccines would be ineffective against omicron. in all the previous examples of variants, the vacation seens