AdvertisementNigeria detects an omicron case from weeks before it was first reported in S. AfricaDecember 01, 2021The Associated PressfacebookEmailA man receives an AstraZeneca coronavirus vaccine in Abuja, Nigeria last month. Nigeria has detected its first case of the omicron coronavirus variant in a sample it collected in October, weeks before South Africa alerted the world about the variant last week, the country's national public health institute said Wednesday. (AP)