With the novel coronavirus spreading across 25 countries, Kerala is continuing its vigil against the outbreak and 3447 people are being monitored over suspicion, in various districts of the state, said Health Minister KK Shailaja. "Of these, 3420 are in-home quarantine and 27 are in hospitals. A total of 380 samples of suspected coronavirus cases have been sent to the NIV for examination. Of the 344 samples tested, results of all are negative," she said.