1. Learning Check!
Answer the following question on a piece of paper, then hand it in.
What did you notice about the fake snot yesterday? How is real snot important to your immune system?

2. Factors that Affect the Immune System

3. vaccines
Vaccines = weakened version of pathogen that are given to people to protect them from getting the disease later
Vaccines allow the body to create antibodies against the disease.
Boosters are needed for some vaccines to extend the immune system’s memory

4. immune system disorders
Allergies
An allergy is an unusually high sensitivity to some substance
Any substance that causes an allergic reaction is called an allergen
Common allergens are: milk, pollen, and dust

5. immune system disorders
Allergies
Body releases chemical called histamine to fight allergen
Common symptoms include a runny nose and watery eyes
Severe allergies can cause an anaphylactic shock

6. immune system disorders
AIDS – Acquired Immunodeficiency Syndrome
AIDS is caused by a virus called HIV
HIV attacks the immune system by infecting Helper T Cells.
When other pathogens or antigens enter the body the immune system can’t activate Killer T cells or B cells.
AIDS is transmitted by blood and semen.

7. Taking care of your immune system

8. Card Combinations Card Combination Action
(e.g. B cell rotavirus + gut cell)
target cell can no longer be infected (put a paper clip, or antibody, on the card)
(e.g. rotavirus + gut cell)
target cell infected (draw a dot on card, once three dots are on the card it is removed from play)
virus + antibody protected target cell
target cell remains in play, virus card removed from play
virus + non-target cell
no action
killer T cell + uninfected cell
(e.g. killer T cell rotavirus + rotavirus infected gut cell)
infected target cell removed from play