At least one school is clashing with officials over how to handle the current measles outbreak, as three of the country's largest secondary schools confirm cases of the highly-contagious disease. Wellington Girls College, which confirmed a second case last week, is flouting the advice of public health and education officials and sending all students home, except for those doing exams, which begin tomorrow. There are now 17 confirmed cases of measles nationwide. Health Correspondent Ruth Hill reports. * This story has been updated since publication.