Fig. 3From: Immunogenicity after outbreak response immunization activities among young healthcare workers with secondary vaccine failure during the measles epidemic in Korea, 2019Measles virus (MeV)-neutralizing antibody concentrations in each group according to measles immunity status.Ā A MeV-neutralizing antibody concentrations 1āmonth after MMR2. B MeV-neutralizing antibody concentrations 6āmonths after MMR2.Ā Group 1: natural immunity; Group 2: immune-induced immunity; Group 3: vaccine failure, MMR: measles-mumps-rubellaBack to article page