Vaccination (AQA GCSE Biology): Flashcards
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Practise the cards
12 cards from this deck
What vaccination does to an individual
What vaccination does to an individual
Makes them immune to a disease before infection
Herd immunity definition
Herd immunity definition
Large proportion immunised, reduces pathogen spread (fewer people to infect)
What happens during first infection with pathogen
What happens during first infection with pathogen
Feel ill until WBCs make specific antibody
Response during secondary infection
Response during secondary infection
Antibodies made faster, no symptoms felt
What vaccination replicates
What vaccination replicates
First infection, so real disease causes no symptoms
What a vaccine contains
What a vaccine contains
Dead or inactivated form of pathogen
How vaccine stimulates immune response
How vaccine stimulates immune response
WBCs produce antibodies complementary to pathogen antigens
Example of disease eradicated by vaccination
Example of disease eradicated by vaccination
Smallpox
Example of disease reduced by vaccination
Example of disease reduced by vaccination
Rubella
How vaccination prevents epidemics
How vaccination prevents epidemics
Through herd immunity
Disadvantage: vaccine effectiveness
Disadvantage: vaccine effectiveness
Not always effective in providing immunity
Disadvantage: vaccine side effects
Disadvantage: vaccine side effects
Bad reactions like fevers can occur, but very rare