Immunity 4
Storyboard Text
- Wow.
- What if I go visit some of my classmates now? If I get sick I won’t have to worry because I’ll just be immune afterwards, right?
- Transmission. That’s a topic for another day. And yes, getting the flu from your classmates would make you immune to this particular version of it. But honestly… don’t try it.
- How do all these germs even get to us?
- There is another sort of immunity that is specific to certain pathogens; active immunity. Let’s look at how that works.
- Oh! Yet another destruction task…
- Step two: Each pathogen has an antigen with a unique shape attached to it. The body will analyse it.
- Step four: These antibodies will destroy pathogens directly or mark them for phagocytes to deal with.
- Guess who’s ba- Oh crap. That was quick
- Step one: Oh no! A pathogen is identified in the body.
- Step five: Memory cells will be created. These store the information required to make antibodies, preventing a later encounter with the same pathogen from harming the body.
- Step three: The body will produce proteins called antibodies, which have complementary shapes to the antigens.
- Vaccination is basically just deliberately infecting someone with a disease to make them immune against it. But it’s a bit more complicated than that.
- What’s injected during vaccinations is a harmless version of the disease, usually just it’s antigens.
- This gives the body a chance to react without being harmed.
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