Center for Research and Production of Vaccines and Biologicals (POLYVAC);
Hanoi;
Vietnam;
Military Academy of Medicine;
Hanoi;
Vietnam;
Kitasato Vaccine Plant;
Kitasato Daiichi Sankyo Vaccine;
Saitama;
Japan;
Laboratory of Viral Infection I;
Kitasato Institute for Life Sciences;
Tokyo;
Japan;
Measles; Vaccine; Rubella; Vaccine; MR; Combined; Vaccine; Elimination; of; Measles; and; Rubella;