Collection
Lassa fever contact tracing
Information sheets for people who have had possible contact with people or material infected by Lassa virus.
Lassa fever is a rare but serious disease caused by Lassa virus. Lassa virus is endemic in parts of West Africa, particularly Guinea, Liberia, Nigeria and Sierra Leone.
These information sheets provide guidance for people who have had various degrees of contact with people or material infected Lassa virus.
Information sheets: Lassa fever
Advice for people who have come into contact with Lassa virus.
Updates to this page
Published 13 August 2026