Question
What is human immune system? What is a vaccine? How immunisation can be achieved?
What is human immune system? What is a vaccine? How immunisation can be achieved?
The immune system protects the body against disease or other potentially damaging foreign bodies. When functioning properly, the immune system identifies and attacks a variety of threats, including viruses, bacteria and parasites, while distinguishing them from the body's own healthy tissue.
An antigenic substance prepared from the causative agent of a disease or a synthetic substitute, used to provide immunity against one or several diseases. Immunization is done through various techniques, most commonly vaccination. Vaccines against microorganisms that cause diseases can prepare the body's immune system, thus helping to fight or prevent an infection.
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