Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Map of sub-Sahara Africa indicating areas from where patients with confirmed nodding syndrome (NS), or head nodding seizures without confirmation of NS (HN), were reported. (A) Tanzania: NS; (B) southern Sudan: NS; (C) northern Uganda: NS; (D) Liberia: HN; (E) Cameroon: HN; (F) western Uganda: present report. Onchocerciasis endemic areas are marked by hatching.
