Flashcards in Immunisation Deck (11)
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1
How can vaccination immunity be developed?
By vaccination using antigens from infectious pathogens, so creating memory cells
2
what can antigens used in vaccines be?
Inactivated pathogen toxins, dead pathogens, parts of pathogens and weakened pathogens
3
What are antigen usually mixed with?
Adjuvant when producing the vaccine
4
When does Herd immunity occur?
When a large percentage of a population is immunised.
5
Why is establishing herd immunity important?
Reducing the spread diseases
6
Why are non immune individuals protected?
There is a lower probability they will come into contact with infected individuals
7
What does the herd immunity threshold depend on?
The type of disease, the effectiveness of the vaccine and the density of the population
8
What are mass vaccination designed for?
To establish herd immunity to a disease
9
When can difficulties arise with mass vaccination programmes?
When widespread vaccination is not possible due to poverty in the developing world, or when vaccines are rejected by a percentage of the population in the developed world
10
What is antigenic variation ?
when some pathogens can change their antigens
11
