Active Immunization is the induction of protective immunity by exposing the immune system to an antigen so that the body mounts its own adaptive response, generating antibodies and memory lymphocytes that provide durable, often long-lasting protection against subsequent infection. It is distinguished from passive Im…
Active Immunization is the induction of protective immunity by exposing the immune system to an antigen so that the body mounts its own adaptive response, generating antibodies and memory lymphocytes that provide durable, often long-lasting protection against subsequent infection. It is distinguished from passive Immunization, in which preformed antibodies confer immediate but temporary protection. Active Immunization is achieved chiefly through vaccination, using live attenuated, inactivated, subunit, toxoid, or nucleic acid platforms that present antigen without causing disease, and it can also follow natural infection. The resulting immunological memory enables a rapid, amplified response on re-exposure and underlies the priming and booster schedules used in Immunization programmes. At the population level, high coverage contributes to herd immunity and the control of communicable diseases, as seen in routine childhood Immunization and in vaccination against emerging threats such as COVID-19. The effectiveness of active Immunization depends not only on vaccine immunogenicity but on uptake, which is shaped by access, service delivery, caregiver and community attitudes, and vaccine hesitancy. Research in this field examines vaccine performance, determinants of uptake among caregivers and health workers, models for efficient Immunization delivery, and strategies to address hesitancy and improve coverage across diverse settings.
5 peer-reviewed articles, ranked by relevance. Each links to its DOI.
The 5 articles above have been cited 22 times in the scholarly literature. Citation data via OpenAlex and Crossref, updated Jun 2026.
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