2023–2025 mpox epidemic

2023–2025 mpox epidemic
  Countries with 10,000+ cases
  Countries with 1,000–9,999 cases
  Countries with 100–999 cases
  Countries with 1–99 cases
  No confirmed clade Ib cases
DiseaseMpox (clade Ib)
LocationPrimarily Central Africa, limited local transmission elsewhere
DateFirst detected September 2023
Declared public health emergency of international concern: 14 August 2024
Suspected cases29,342 since 1 Jan 2024
Deaths
812 since 1 Jan 2024
Suspected cases have not been confirmed by laboratory tests as being due to this strain, although some other strains may have been ruled out.

An epidemic of a new variant of clade I mpox (formerly known as monkeypox), called clade 1b, began in Central Africa at least as early as September 2023. As of September 2024, more than 29,000 cases have been reported, with over 800 fatalities (~3% fatality rate), nearly all in the Democratic Republic of the Congo. According to the European CDC: "The size of these outbreaks could be larger than reported due to under-ascertainment and under-reporting."

On 14 August 2024, the World Health Organization declared the epidemic a public health emergency of international concern.