[1] Erasmus Univ, Inst Virol, WHO, Global Reference Lab Measles, NL-3000 DR Rotterdam, Netherlands
[2] Univ Amsterdam, Dept Med Microbiol Clin Virol, NL-1105 AZ Amsterdam, Netherlands
[3] Univ Amsterdam, Acad Med Ctr, Emma Childrens Hosp, NL-1105 AZ Amsterdam, Netherlands
[4] Natl Inst Publ Hlth & Environm, Res Lab Infect Dis, NL-3720 BA Bilthoven, Netherlands
[5] Lab Natl Sante, WHO, Collaborating Ctr Measles, Dept Immunol, Luxembourg, Luxembourg