All New Zealanders who have been in China in the last 14 days and have returned home since the travel restrictions were introduced have been asked to go into self-isolation for 14 days, which is believed to be longer than the incubation period of this virus. Previous experience suggests that self-isolation compliance rates will be high, as people are conscious of the risks that infectious diseases pose to their family, whānau, and community. For example, during the 2009 influenza pandemic there were high rates of compliance in the initial weeks of the event and the ministry did not need to use any powers to ensure self-isolation. So far more than 1,800 people have self-registered with Healthline about their isolation. Healthline staff are keeping in regular contact with those people to provide them advice and support and to check on their welfare. Customs and the Ministry of Health are also sharing data to enable Healthline to proactively contact anyone who has returned from China but has yet to register with Healthline.