AdvertisementThe omicron variant spreads across Europe as new travel bans take effectUpdated November 27, 2021Deepa ShivaramfacebookEmailTravelers walk near an electronic flight notice board displaying canceled flights at O.R. Tambo International Airport in Johannesburg, South Africa, on Saturday. Several countries have begun travel bans in response to the omicron variant. (AFP via Getty Images)This article was originally published on November 27, 2021.