Vaccines.

Active Immunity:

When the immune system makes its own antibodies after being stimulated by the correct antigen.

Natural - Where the body fights the disease. Artificial - The vaccine is full of antigens. 

Passive Immunity:

When you are given antibodies made by a different organism, not produced by your own immune system.

Natural - Antigens from breast milk. Artificial - The vaccine is full of antibodies.

Active immunity - long term because memory cells are produced whereas in passive immunity is not.

• Vaccines help to avoid the suffering due to the primary response as they give you artificial active immunity.
• Herd immunity is where most people are vaccinated…