Large-scale mosquito control programs and better measures the number of malaria cases worldwide fell by 37% in many tropical countries, according to WHO since 2000. Because malaria is less common, also decreased the risk for travelers since 2000. Especially travelers to areas with a low risk, where your destination belongs, travelers run less risk of malaria. Therefore, these areas are no longer advised to swallow every day preventive antimalarial drugs since April 1, 2017. Since then advised to take emergency treatment. This treatment should only be taken if you develop symptoms that may be caused by malaria. For instructions on how to take the emergency treatment we recommend that you carefully read the leaflet 'Malaria-emergency treatment. The purpose of this study is to assess the impact of these revised recommendations.