The vaccination given for preventing tuberculosis is:

Becoming exposed to or infected with an infectious microbe does not necessarily mean developing noticeable disease. Explain.

The role of an active immune system is:

What precautions will you take to justify "prevention is better than cure"?

$(a)$ State the principle of immunisation. Name two diseases for which vaccines are available.
$(b)$ Mention two basic principles of prevention of infectious diseases.

What do you mean by immune response?