The 14-year-old boy from Kerala's Malappuram, who was undergoing treatment here for Nipah infection, died on Sunday, state Health Minister Veena George said. Earlier, in 2018, at least 17 people from the Kozhikode and Malappuram districts died due to the Nipah virus. Amid the rising concerns over the spread of the virus, what are the causes, symptoms, and treatments available? Listen in to this NDTV explainer.