Teacher:In this task, you are given one French sentence. The major part of the sentences talk about health-related topics, but some of the them describe an organization and its activities. Your job is to translate the given sentences into English.
Teacher: Now, understand the problem? Solve this instance: Apres les ameliorations de l'hygiene generale (et en premier lieu de l'approvisionnement en eau potable), les vaccins constituent la mesure de sante publique la plus rentable et la plus economique.
Student:
After general hygiene improvements first of all clean water supply vaccines represent the most effective and cost-saving public health intervention.