Active immunization is the induction of immunity that occurs after exposure to an antigen, in which the recipient own body produces antibodies and forms memory cells capable of responding if the same pathogen appears again. It can occur naturally, when a person is exposed to a microbe they have not previously encountered and has no pre-formed antibodies, or artificially, when a treated, weakened or partial form of the microbe is deliberately introduced before natural exposure occurs; vaccination is the most familiar example of artificial active immunization. It differs from passive immunization, in which ready-made antibodies are transferred into the body rather than produced by it.
Facts
FAQs
Can a person still get infected after being vaccinated?
The CDC says immunity can take weeks to develop after vaccination.
Vaccination is the most familiar form of artificial active immunization. The US Centers for Disease Control and Prevention notes that immunity can take weeks to develop after vaccination, so it is possible to become infected in the weeks immediately following vaccination.
Sources
1. Wikipedia
Wikipedia contributors, Wikimedia Foundation
Active immunization (Wikipedia)
https://en.wikipedia.org/wiki/Active_immunization, lead sectionQuote, https://en.wikipedia.org/wiki/Active_immunization, lead section
Active immunization is the induction of immunity after exposure to an antigen.
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