what is vaccine ?? describe breifly in minmum 5 lines
Answers
Answer:
A vaccine is a biological preparation that provides active acquired immunity to a particular infectious disease. A vaccine typically contains an agent that resembles a disease-causing microorganism and is often made from weakened or killed forms of the microbe, its toxins, or one of its surface proteins. The agent stimulates the body's immune system to recognize the agent as a threat, destroy it, and to further recognize and destroy any of the microorganisms associated with that agent that it may encounter in the future. Vaccines can be prophylactic (to prevent or ameliorate the effects of a future infection by a natural or "wild" pathogen), or therapeutic (to fight a disease that has already occurred, such as cancer). Some vaccines offer full sterilizing immunity, in which infection is prevented completely.
Answer:
Vaccine :- It is suspension of disease producing microbes. which does not cause disease but on entering, body initiates system to produce.
Explanation:
1. It is an antigenic substance.
2. It develops immunity against a disease which can be delivered through needle injections or by mouth or by aerosol.
3. In the vaccines, a dead or weakened version of a microbe is present.
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