New Zealand doctor Lance O'Sullivan fears the spread of hysteria over the deadly coronovirus, saying the answer to outbreaks like this one is better vaccination programmes. At least 17 people are dead and more than 500 infected in China alone, as the virus spreads from Wuhan to other provinces and countries. New Zealanders visiting relatives in China are now trapped in Wuhan with the city in lockdown. Public transport in the Chinese mega-city has been suspended. And the World Health Organisation is expected to make an announcement tomorrow on whether it will declare an international health emergency, after deciding it needs more time to assess the situation. Doctor O'Sullivan is in China, he talks to Lisa Owen.