13:06Newshour28/11/2021 13:06 GMT: Covid: Will current vaccines be effective against Omicron variant?BBC World Service Duration: 50 minutes Sun 28th Nov 2021, 13:06 on BBC World Service OnlineInterviews, news and analysis of the day’s global events. Show more GenresNewsFormatsMagazines & ReviewsBrandNewshour Source: BBC Online