About the Vaccines

Vaccines are probably the most cost-effective tool in the prevention of disease. Most vaccines can be administered in the very early stages of life with protection lasting well into adulthood, with the requirement of probably a further boost in the teenage years. With some vaccines, multiple boosters may be required.

In most countries, the widespread use of childhood vaccines has resulted in the dramatic decrease in the incidence of these childhood diseases. With the introduction of the Expanded Program of Immunisation (EPI), there has been an increase in the percentage of children who receive the six childhood vaccines, with some resource-poor countries reporting vaccine coverage of well over 80%.

Most new vaccine candidates now target this programme to introduce childhood vaccines although there is a concern that the childhood immune system may be overloaded at such early ages with the added danger of negative interaction of vaccines.