The Omicron variant of Covid-19 has spread around the world at a rapid pace since it was first discovered in southern Africa in November but there is still a great deal we do not know about it.
More data is needed to determine its precise characteristics and how it responds to our existing coronavirus vaccines, but what seems beyond doubt is that it is more transmissible than any previous strains we have encountered over the course of the pandemic so far, including the Alpha and Delta variants.
