Download Viruses - MsVachonsScienceSpace

Virus Attack
Ms Vachon
A simple sneeze…
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VIDEO
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…Can lead to this:
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Virus invades cell
Your Body’s Lines of Defense
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Interferon
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White Blood Cells (your “fighters”)
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Interferon
White Blood Cell vs Bacteria
Some white blood cells release antigens
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How Antigens stop viruses
First Line of Defense
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INTERFERON
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Chemical released by the first cell
attacked
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Warns other cells
Calls in the big boys…
Second Line of Defense (your
fighters)
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White Blood Cells
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Attack and destroy invaders (typically
viruses/bacteria)
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Also called “leukocytes”
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Made in your
bone marrow
Your Fighter’s Ammo
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Some white blood cells make antibodies
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These antibodies bind with and change the
shape of the “keys” on the outside of viruses
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This way, they can’t enter a cell
How Can You Keep Your
Immune System Strong?
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Your immune system is constantly working
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Doctors recommend
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The immune response is complex.
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Proper fuel
Proper training (exercise)
THIS YEAR
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2013 Flu Season