Ethics approval and consent to participate
The participation in this study was voluntary, anonymous and did not represent a risk for the participants or their families. This study did not include human participants that are minors. Socio-demographic information was provided by a household participant (the head of house or parent) who had to be at least 18 years old and sign an informed consent. All participants were informed they could withdraw from the study at any time. The study was explained in Spanish by a vector control technician to participants. Participants did not receive any kind of compensation for taking part in the study. For data protection the information collected is anonymized: the questionnaire will not record names or addresses. Household address had an individual code for identification. The originals were kept in a safe place (locker) and were not being shown to anybody else. The originals will be kept for 12 months after publication and then destroyed. Study results or publications will present aggregated data only. Researchers confirm that all methods were carried out in accordance with relevant guidelines and regulations. The ethics committee of the Albert-Ludwigs-Universität Freiburg, Germany approved the project and the intervention was authorized by the local health authorities in Colombia.