Vaccines & Human Health

Vaccines

A vaccine is a weakened (attenuated) or killed form of a pathogen

Most vaccines are injected to avoid destruction by digestive enzymes

Vaccines

Stimulate the body's immune response to create antibodies and memory cells specific to the disease.

Immune system is prepared for immediate and specific attack if faced with the pathogen again.

Immunity

Immunity: Possessing the antibody response to a particular pathogen to prevent the development of illness.

Passive Immunity: Antibodies are passed from one individual to another. Ex. Mother to child

Acquired Immunity: Immune system form antibodies as result of exposure to pathogenNatural Immunity Result of infection

Artificial Immunity Result of vaccination

Herd Immunity: Occurs when the vaccination of a significant portion of a population (or herd) provides a measure of protection for individuals who have not developed immunity.

Why is this important?

The First Vaccine

Edward Jenner: The Biography of a Great Thinker https://youtu.be/i_ghK1FXkOw

The First Vaccine

Edward Jenner Observed:

Hypothesized:

Tested:

Concluded: