Omicron is the name of the new coronavirus variant which effectively closed the borders of seven countries in Southern Africa, and wiped billions off global financial markets.
The health secretary warned that the new strain could pose a substantial risk to public health, as it has the potential to evade vaccines and spread rapidly.
Sky's Science and Technology editor Tom Clarke reports.
SUBSCRIBE to our YouTube channel for more videos: www.youtube.com/skynews
Follow us on Twitter: twitter.com/skynews
Like us on Facebook: www.facebook.com/skynews
Follow us on Instagram: www.instagram.com/skynews
For more content go to news.sky.com and download our apps:
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí www.youtube.com/channel/skynewsespanol