The question of how to conduct post-elimination surveillance is a high priority for the NTD community, given that most NTD programs scale back or shut down completely once elimination as a public health problem is achieved. Few solutions exist and this proposal provides an interesting and useful case study for surveillance moving forward. The study team plans to target 1708 pregnant women as a proxy for measuring LF resurgence in a post-elimination context. As a comparison group, they plan to conduct a prevalence survey of 427 households (1708 participants) in the same community to compare LF prevalence found in each methodology. Each participant at the health facility’s residence will be geo-referenced to understand the coverage area. They also plan to conduct interviews with patients and health workers, a time-motion study, and a cost analysis to assess the additional burden on health care workers and the health system. The study will occur in 14 facilities in one district of Malawi where LF was highly endemic prior to the launch of the program.