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प्रश्न
Write a short note on vaccination.
टिप्पणी लिखिए
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उत्तर
Vaccination is the process of introducing a vaccine, which is a preparation of weakened, killed, or parts of pathogens (antigens), into the body to stimulate the immune system to produce antibodies and memory cells. This active immunity helps the body fight off future infections by the same pathogen. Vaccines can be made from toxoids, killed organisms, attenuated live organisms, or recombinant DNA technology. Booster doses may be given to strengthen immunity. Vaccination is a vital preventive measure against infectious diseases like tuberculosis, measles, polio, hepatitis B, and more.
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