World Health Organisation has said that the Omicron coronavirus variant has been reported in 89 countries and the number of cases is doubling in 1.5 to 3 days in areas with community transmission. In a fresh update, the W.H.O. said that Omicron is spreading rapidly in countries with high levels of population immunity, but it is unclear if this is due to the virus' ability to evade immunity, its inherent increased transmissibility or a combination of both. Watch the video for more.