Columbia subject headings:
Harvard subject headings:
Children--Health and hygiene--Government policy--Developing countries.
Communicable diseases in children--Developing countries--Prevention.
Communicable diseases in children--Prevention.
Medical policy--Developing countries
Vaccination of children--Developing countries.
Vaccination of children--International cooperation.
Vaccination of infants--Developing countries.
Vaccination of infants--International cooperation.
Vaccines
Princeton subject headings:
Immunization of children.
Immunization of infants.
Immunization--Research.
Immunization.
Vaccines.