A research group implemented a survey over two years to assess vector infestation and the infection risk of the parasite Trypanosoma cruzi in triatomine bugs, the culprits responsible for Chagas disease, throughout El Salvador. Their findings showed the nationwide ubiquity of the principal insect vector and identified areas where these insects have high Trypanosoma cruzi infection rates. The results contribute to potential cost-effective vector control efforts that concentrate attention and resource allocation to highly infected areas in El Salvador.