measles specific lymphocyte stimulation ratios were significantly higher in recipients of killed vaccine than in three compara , ive groups , in subjects with a killed-live interval in the initial vaccine series of less than or equal to 2 months as compared with greater than or equal to 3 months , and in subjects with prevaccination hai antibody titers of less than or equal to 5 as compared with titers greater than or equal to 10 .
C0042212
killed vaccine
C0042210
vaccine