Thiruvananthapuram: India's third case of coronavirus was reported in Kerala after the country's first two infectious disease cases reported by the southern state, which in the last four days killed over 350 people in China. The three students came back from China's Wuhan city. The coronavirus which began in China and has spread in the last few weeks to more than 20 countries around the world, has been declared a global health emergency by the World Health Organization.