Vaccines

If you have immunity to a disease:

• It can not enter your body

• Your body can fight the disease off before it makes you sick.

• The germs change as soon as they enter your body.

• You will be able to recover very quickly.

Which of these is part of your body's first defenses against disease?

• Skin

• Antibodies

• White blood cells

• Heart

A white blood cell destroys an invading germ by:

• Changing its chemical composition

• Changing its genetic structure

• Pulling it apart

• Engulfing it

What do antibodies do?

• Attach themselves to germs to flag them for destruction.

• Engulf and digest germs.

• Make your cells impenetrable to germs.

• Carry genes from your bloodstream to the outside of your body.

Invading germs can be identified by their:

• Leukocytes

• Antibodies

• Antigens

• Red blood cells

What might happen if your immune system lacked memory cells?

• Your body wouldn't be able to fight off diseases.

• Diseases would make you sicker than normal.

• You might get the same disease over and over.

• Your body wouldn't be able to produce antibodies.

Tags

NGSS.HS-LS1-3

A person develops natural immunity.

• Before getting sick.

• After one dose of a vaccine.

• After several doses of a vaccine.

• After recovering from an illness.

Unlike germs in nature, the germs used in vaccines:

• Don't have antigens

• Are weakened or altered

• Aren't real germs

• Change share frequently

Who benefits from herd immunity?

• Young children

• Elderly people

• Cancer patients

• All of the above

What do measles, smallpox and polio have in common?

• They are caused by bacteria.

• Vaccines have dramatically reduced the number of people who catch them.

• They are constantly changing

• They have been wiped out forever.