December 1, 2025: Current infectious disease outbreaks

Marburg virus disease – Ethiopia (first recorded national outbreak) Marburg is a filovirus causing severe hemorrhagic fever with high case fatality; Ethiopia’s first outbreak in South Ethiopia Region has led to multiple confirmed cases and deaths, with hundreds of contacts under follow-up and heightened concern for spread to neighboring countries. Authorities, supported by WHO and partners, are implementing isolation of cases, contact tracing, safe burials, risk communication, and enhanced border and airport surveillance; no licensed vaccine is yet in routine use, though candidate vaccines and monoclonal therapies are on standby for potential trial or compassionate deployment. Source: WHO DONS – Marburg Ethiopia Rift Valley fever – Senegal and Mauritania Rift Valley fever is a mosquito-borne viral zoonosis affecting livestock and humans; current outbreaks in Senegal’s Saint Louis region and multiple Mauritanian regions have caused hundreds of human cases and dozens of deaths, with substantial impact on pastoralist communities and trade in animals and animal...