4Kobune F,Funatu M,Takahashi H,et al.Characterization of measles viruses isolated after measles vaccination.Vaccine,1995,13:370-372.
5Huiss S,Damien B,Schneider F,et al.Characteristics of asymptomatic secondary immune responses to measles virus in late convalescent donors to measles virus in late convalescent donors.Clin Exp Immunol,1997,109:416-420.
6Muller CP.Measles elimination:old and new challenges? Vaccine,2001,19:2258-2261.