Immunogenicity of the AIK-C measles vaccine in infants aged <9 months in Vietnam.

•Measles-associated deaths have been reported in unvaccinated infants in outbreaks.•A clinical trial was conducted on 210 subjects immunized with AIK-C at 6–8 months.•A seroresponse was noted in 88% with no significant differences among age groups.•No significant differences by age were noted in GMT and adverse events.