With the spread of Omicron raising alarm bells across the nation, Tamil Nadu has mandated week-long home quarantine for all international passengers landing in the state starting today. The new ruling includes travellers from both at-risk and non at-risk countries. The state government tweaked their previous guideline after data revealed that the bulk of Tamil Nadu's 34 reported Omicron cases are passengers from countries classified as non at-risk. Only six per cent of the state's Omicron cases are from at-risk countries, while 25 per cent come from non at-risk countries, said a statement from the Tamil Nadu Health Department.