CNN:- Many of the world's richest countries have spent the past year hoarding coronavirus vaccines, buying up enough doses to vaccinate their populations several times over and consistently failing to deliver on their promises to share doses with the developing world. The World Health Organization said the approach was 'self-defeating' and 'immoral.' It might be starting to bite. A new and potentially more transmissible variant of the virus likely emerged from a region with low vaccination rates. The new variant, known as Omicron, was first identified in South Africa, although it is unclear whether it originated there or whether it was