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Outbreak Updates

27 May 2026

Nigeria

Lassa fever in Nigeria

As of 10 May 2026, a total of 793 confirmed Lassa fever cases, with 5,034 suspected, five probable cases and 204 deaths, have been reported across 23 states in Nigeria for 2026. This includes 45 cases in health workers. Please see our Topics in Brief article for further details on Lassa fever.

Source: State Lassa fever in brief

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UK Health Security Agency

Hospital for Tropical Diseases

Liverpool School of Tropical Medicine

London School of Hygiene and Tropical Medicine

University College London Hospitals NHS Foundation Trust

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