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The following text is from an archived Red Book® edition and may not reflect current recommendations or information. To view the current edition, click here.
Section 1. Active and Passive Immunization
ACTIVE IMMUNIZATION
Active immunization involves administration of all or part of a microorganism or a modified product of that microorganism (eg, a toxoid, a purified antigen, or an antigen produced by genetic engineering) to evoke an immunologic response mimicking that of the natural infection but that usually presents little or no risk to the recipient. The immunization can result in antitoxin, anti-invasive, or neutralizing activity or other types of protective humoral or cellular response in the recipient.
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