| primary vaccination | <virology> First or principal vaccination with the introduction of a vaccine into the body for the purpose of inducing immunity. (18 Nov 1997) |
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| DPT vaccination | <immunology> A vaccination administered to infants for protection against diphtheria, pertussis (whooping cough) and tetanus. Vaccinations are typically administered at 2, 4, 6 and 15 months. A final vaccination is now recommended at 4-6 years of age. (27 Sep 1997) |
| yellow fever vaccination | A live attenuated (weakened) viral vaccine recommended for people traveling to or living in tropical areas in the americas and africa where yellow fever occurs. (12 Dec 1998) |