Mpox Spreads from Madagascar to Réunion and Mayotte: A Growing Concern
Recent data indicates a concerning spread of Mpox (formerly known as monkeypox) from Madagascar to the French territories of Réunion and Mayotte. As of March 26, 2026, Réunion has identified 7 cases of Mpox, while Mayotte reports 11 cases this year. This outbreak highlights the importance of vigilance and preventative measures, particularly regarding travel to and from affected regions.
The Situation in Réunion
In Réunion, the cases identified are linked to the MPXV clade Ib virus. Three cases were imported directly from Madagascar, detected in weeks 5, 7, and 12. Crucially, four cases have emerged as autochthonous – meaning they were contracted within Réunion itself. Of these, three represent secondary transmission from the imported cases, demonstrating local spread.
Mayotte Faces Increasing Cases
Mayotte is experiencing a more significant number of cases, with 11 identified so far in 2026. Three of these were imported from Madagascar, while seven are autochthonous. The local transmission in Mayotte is more complex, with four cases representing secondary transmission from imported cases and three representing tertiary transmission – spread from individuals already infected within Mayotte.
Understanding the Clade Ib Virus
The MPXV clade Ib virus is the specific strain driving these cases. Understanding the characteristics of different Mpox clades is crucial for effective public health responses. Clade Ib has been associated with more severe disease in some instances, though data is still emerging.
Travel and Vaccination Considerations
The emergence of Mpox cases in Réunion and Mayotte, linked to travel from Madagascar, underscores the importance of travel health advisories. Individuals traveling to these regions should be aware of the risks and consider preventative measures. The “Vax-Before-Travel” recommendation is gaining traction as a proactive approach to mitigate the spread.
Public Health Response and Surveillance
Public health authorities in France are actively monitoring the situation through epidemiological surveillance, as reported by Santé publique France. Continued surveillance is essential to track the spread of the virus, identify new cases, and implement appropriate control measures.
Frequently Asked Questions
What are the symptoms of Mpox?
Symptoms include rash, fever, headache, and muscle aches.
How does Mpox spread?
It spreads through close contact with an infected person or animal, or contaminated materials.
Is there a vaccine for Mpox?
Vaccines are available, and pre-travel vaccination is being considered.
Source: Santé publique France
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