Countries across the globe shut their borders to Britain on Monday due to fears about a highly infectious new coronavirus strain, causing travel chaos and raising the prospect of food shortages in the United Kingdom. On India Today's show News Today, scientist of World Health Organization (WHO) Dr Soumya Swaminathan spoke about mutant strain that has triggered fear on Wednesday evening. She answered to the question - Coronavirus mutant threat: Is the new variant more dangerous? How does this affect COVID vaccine rollout if at all?