In brief
The California Department of Public Health confirmed a new outbreak strain of mpox, previously known as monkeypox, in the United States.
California has recorded its first case of the emerging mpox strain, officially known as Clade I, as confirmed by the California Department of Public Health (CDPH). The affected individual, who is currently in home isolation, recently returned from a trip to Africa, where the outbreak of this specific strain is ongoing. This case is significant as it diverges from the previously circulating Clade II strain that has been known in the US since 2022.The CDPH noted that although Clade I infections have historically resulted in more severe illness than Clade II, recent cases may indicate a shift, with current infections potentially being less severe than previously experienced outbreaks. Mpox, caused by a virus closely related to smallpox, was designated a global health emergency by the World Health Organization earlier this year due to its rising incidence.Mpox typically manifests with initial symptoms such as fever, headaches, swollen lymph nodes, back pain, and muscle aches, followed by a rash that can be painfully itchy or further distressing. While the infection can resolve independently after a course of 14 to 21 days, it poses a higher risk of fatality for vulnerable populations, including young children.Historically, mpox has been endemic in the tropical rainforests of West and Central Africa, particularly the Democratic Republic of Congo, where outbreaks have been reported and led to numerous fatalities in recent months. Vaccinations can prevent future outbreaks, although they are generally restricted to at-risk populations or individuals who have had close contact with infected persons. As the situation develops, experts are urging the public to stay informed about mpox transmission and prevention strategies.
