Omicron variant of coronavirus has governments across the world on alert. The variant, which was first found in South Africa has now spread to many other countries and nations all over the world are releasing guidelines or restricting air travel to try and ensure that the virus doesn't cross their borders.

Omicron threat: Here is 'countries-at-risk' list released by India

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Omicron threat: Here is 'countries-at-risk' list released by India