Recently, the Indian variant of the novel coronavirus has been detected in Việt Nam. At the same time, people who finished 14-day quarantine periods went on to test positive. Hoàng Vũ Mai Phương, Head of Virus Department, National Institute of Hygiene and Epidemiology, talks to Sức khoẻ đời sống (Life and Health) Newspaper about research related to this virus variant.