How vaccination works
Series: Agnote DAI/190 Edition: First edition Last updated: 01 Jul 2000
Almost all vaccination programs (particularly those using killed vaccines) require two doses for vaccination to be effective. It is, however, still common practice for producers to vaccinate only once or whenever they perceive the risk of disease may be high rather than adopting a set program.
This Agnote explains how vaccines work to help producers accept the need for a booster vaccination.
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How vaccination works |
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