What is Vaccine? Definition, Meaning & Example
A preparation containing weakened or inactive pathogen used to develop immunity.
TL;DR: A preparation containing weakened or inactive pathogen used to develop immunity.
Written & reviewed by the Syllab.in Academic Team (CBSE/NCERT subject experts) · Updated
Vaccine: A preparation containing weakened or inactive pathogen used to develop immunity.
Explanation
Vaccines contain weakened or killed microorganisms or their antigens. When administered, they stimulate the immune system to produce antibodies without causing the actual disease. Vaccination creates immunological memory for faster response to future infections. Vaccination programs have eliminated or controlled many diseases in India including polio, measles, and tuberculosis. Vaccines are administered following the National Immunization Program schedule.
Example
The polio vaccine contains weakened poliovirus that trains the immune system to recognize and fight polio without causing the disease.
Frequently Asked Questions
How does a vaccine work?
A vaccine contains a weakened pathogen that stimulates the immune system to produce antibodies and develop immunity without causing disease.
Is vaccination safe?
Yes, vaccines undergo rigorous testing and are safe. The benefits of vaccination far outweigh the risks.
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