Covid-19: Why WHO called Omicron as variant of concern?

World Health Organization calls Coronavirus new variant 'Omicron' as a variant of concern. The scientific community says the new strain is horrific. A new variant of the coronavirus, now named Omicron, has set alarm bells ringing across the world. B.1.1.529 or Omicron was first identified in South Africa. Watch the video to know more.