Key Points

Mpox

Three new cases of smallpox B (Mpox) were identified in S39 (September 21–27), following four consecutive weeks without any new cases reported in Mayotte.

Acute Gastroenteritis (AGE)

• The outbreak of acute gastroenteritis (AGE) caused by rotavirus A continues in the territory.
• In Week 40 (September 28–October 4, 2026), 30 positive test results were recorded, representing a positivity rate of 32.6%.
• There were 32 emergency department visits for AGE in this age group, 9 of which resulted in hospitalization.

Acute Respiratory Infections (ARI)

• Influenza A(H1) virus has been circulating since week 30. Data has not been available since week 39.

Malaria

• Six new cases of malaria were reported in week 40;
• Since the beginning of 2026, 370 cases of malaria have been recorded in Mayotte, including 270 imported cases, 79 locally acquired cases, 12 cases of undetermined status, and 9 cases under investigation;
• Of the 370 cases recorded since the beginning of the year, 101 required hospitalization, including 10 severe cases that required admission to the intensive care unit.