Immunisation

Question 1

Vaccination programmes are used to

Answer 1

develop immunity from infectious pathogens

Question 2

Antigens are usually mixed with

Answer 2

an adjuvant

Question 3

An adjuvant helps to

Answer 3

make the vaccine more effective by enhancing the immune response

Question 4

Herd immunity is established when

Answer 4

a large percentage of the population is immunised

Question 5

The herd immunity threshold depends on

Answer 5

the type of disease, effectiveness of vaccine and density of population.

Question 6

Mass vaccination programmes are designed to

Answer 6

establish herd immunity to a disease

Question 7

Widespread vaccination is not always possible due to

Answer 7

poverty in the developing world or when the vaccines are rejected by a percentage of the developed world.

Question 8

Antigenic variation occurs when

Answer 8

pathogens change their antigens

Question 9

If pathogens change their antigens, memory cells

Answer 9

are NOT effective against them

Question 10

A well known example of a virus than shows antigenic variation is

Answer 10

Influenza (flu virus)