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Biology
Immune system
Vaccinations
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Cards (19)
What is the main topic of the video?
How
vaccines
work and their
pros and cons
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What happens to our immune system after exposure to a pathogen?
It generally
develops
immunity
to that pathogen
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Why is it problematic to catch a disease for the first time?
It can range from
unpleasant
to
lethal
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What is the purpose of vaccines?
To expose us to
pathogens
without causing disease
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What do vaccines contain?
Weakened
or
inactivated
pathogens
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How does the body respond to the antigens in vaccines?
By producing
antibodies
and developing
immunity
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How many diseases are we vaccinated against by primary school?
More than a
dozen
diseases
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What is one major pro of vaccines?
They protect us from catching
horrible
diseases
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What larger scale effect do vaccines have on diseases?
They help control diseases that were
common
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What is herd immunity?
When enough people are immune to a
pathogen
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How does herd immunity affect disease spread?
It prevents the
pathogen
from spreading
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What happens if a few people aren't vaccinated in a herd immunity scenario?
They're unlikely to catch the
disease
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What is a common problem with vaccines?
They don't always grant full
immunity
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How do we check if an important vaccine has been effective?
By checking after the
injection
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What are some bad reactions to vaccines?
Swelling
,
fevers
, or
seizures
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How common are bad reactions to vaccines?
They are pretty
rare
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Where can you find more videos and resources on vaccines?
On the website
Cognito
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What additional resources does the website Cognito offer?
Questions,
flashcards
, and past papers
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What does Cognito track for users?
Your
progress
in
studying
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