KUALA LUMPUR — Southeast Asia is the region most vulnerable to the new coronavirus outbreak, which has killed 170 people in China and infected almost 8,000 since the turn of the year. Several dozen cases of the virus have been reported across the region, with 14 confirmed in Thailand — the most of any country outside of China — as of Jan. 28. By Jan. 30, 10 cases were reported in Singapore. Hundreds more people are under medical observation or in quarantine, pending confirmation of infection or a disappearance of symptoms. The number of cases in Malaysia rose to eight on Jan. 30. “It looks like the volume of airline travelers from cities in mainland China are highly correlated with the number of cases reported in affected countries,” said Shengjie Lai of the University of Southampton, co-author of an analysis of travel trends within and from China which aims to predict what places might be most at risk of further outbreak. Of the 30 most exposed cities outside China, 14 are in Southeast Asia, with Bangkok facing the highest risk globally. Singapore, Phuket, and Kuala Lumpur are among the 10 cities most at risk. Seven of the 14 countries deemed most vulnerable are in Southeast Asia, according to the study, which was published on Jan. 28.