THIRU'PURAM/NEW DELHI, March 8 -- THE number of coronavirus cases rose to 39 in India on Sunday, after a couple and their son, who had flown from Italy last month and evaded airport screening, and their two relatives tested positive in Kerala, prompting the state authorities to warn of strict action, including prosecution, against those hiding travel history and symptoms of the infection.

Kerala Health Minister KK Shailaja said the state has been put on high alert in the wake of the new cases, reported more than a fortnight after India's first three coronavirus patients -medical students from Wuhan- were discharged from hospitals in the state.

The minister said all the passengers who travelled with the infected family in the Venice-Doha Q...