According to the currently available epidemiological analysis, the most affected age groups are people aged 18-30 and young infants before they are eligible to receive the first dose of measles vaccine at nine months of age. This finding suggests that there is an immunity gap against measles among people who were bom between 1986 and 1998 (currently 18-30 years of age) and newborn infants who are too young to receive the first dose of measles vaccine and are not protected by the immunity of the mother. The only way to close the immunity gap for both groups was to conduct a vaccination campaign with measles-containing vaccine.