What you need to know about Omicron, the new COVID-19 'variant of concern'

At some point we all need to move on from the death and doom of Covid, live with Omicron and prepare for coming Sigma and Omega variants, writes Nicholas Agar
The Omicron variant has been listed as a COVID-19 'variant of concern' and is shutting down borders across the globe. Here's what we know about it.
If you’ve had COVID before and figured that you’re probably immune, you may be more susceptible to Omicron than to previous variants.
With the worsening Covid-19 situation across Europe and the spread of the new Omicron variant, the UK has announced yet more new testing rules for arrivals. Here's what you need to know about the new requirement for pre-departure tests.