Overall, 64 measles cases were identified (57 children, seven adults), with 57 laboratory-confirmed cases (47 by RT-PCR MeV detection and 10 by detection of MeV-specific IgM antibodies, mean delay between onset and sample collection: 2 days) and seven cases with an epidemiological link to a laboratory-confirmed case. The gene discussed is CD40LG; the disease is measles.