An outbreak of mpox in the Democratic Republic of the Congo has led the Centers for Disease Control and Prevention (CDC) to issue a health advisory.

Mpox, formerly known as monkeypox, is related to the smallpox virus and causes a rash that can look different in different people. It typically shows up after a 2- to 21-day incubation period as lesions that are firm or rubbery, are deep-seated, and often develop umbilication with a dot on the top of the lesion.

In addition to the rash with lesions often developing simultaneously on any part of the body, symptoms can include headache, muscle aches, swollen lymph nodes, and sometimes fever.