A confirmed case of measles is one that has had positive serological confirmation of measles-specific IgM antibody in a person who had not received measles vaccination within 30 days before the specimen collection, or one with epidemiological linkage to a lab confirmed case of measles during a confirmed outbreak period, or a case of suspected measles that is clinically compatible but was not investigated with a lab specimen or linked to an outbreak3. The gene discussed is CD40LG; the disease is measles.