The current measles outbreak in NZ shows why we need to stamp out polio. This outbreak of measles was imported from abroad due to international travel and has now spread from Auckland to Hawkes Bay, Waikato and Northland. While we are a developed country there are still groups of unimmunised people out there allowing the disease to spread. Measles may spread more easily than polio but while we still have any cases in the world we risk reintroducing it to NZ due to complacency. Check http://www.voxy.co.nz/health/second-wave-measles-hits-waikato/5/97658 for an update on the spread of measles.