The large numbers of children have led the Bangladesh health ministry to embark on a vaccination campaign, supported by Unicef and the World Health Organization, focused on some 150,000 children who are 15 or younger. The seven-day campaign against the most contagious childhood diseases, including measles, suggest the crisis is being treated differently this year by Bangladesh, at least when it comes to immunization. In general, aid agencies have only been able to provide limited help to Rohingya arrivals who were not part of the registered population of the country’s two official Rohingya refugee camps (a stance seen in other nations too). But in the wake of measles outbreaks in the area last year and this year, particularly among those from Myanmar, immunization appears increasingly to be a priority.