KA7- Vaccination And Herd Immunity

Question 1

(Vaccines) 1) A vaccine causes… 18

Answer 1

an artificial primary cells by lymphocytes is triggered by exposure to antigens of the pathogen

Question 2

(Vaccines) 2) Immunity can be… , so… 15

Answer 2

developed by vaccination containing antigen of the pathogen, so creating memory cells

Question 3

(Vaccines) 3) The antigens in the vaccines… 18

Answer 3

are in the form of: dead, inactivated pathogens, weakened pathogens or parts pathogens

Question 4

(Vaccines) 4) An antigen is usually… 12

Answer 4

mixed with an adjuvant when producing a vaccine

Question 5

(Vaccines) 5) An adjuvant is… , … 16

Answer 5

is a substance which makes the vaccine more effective, so enhancing the immune response

Question 6

(Herd immunity) a) Mass vaccination programmes… 12

Answer 6

are designed to establish herd immunity for a disease

Question 7

(Herd immunity) b) Herd immunity is… 12 Establishing… 11

Answer 7

where a large percentage of the population is immunised
herd immunity is important in reducing the spread of disease

Question 8

(Herd immunity) c) Non-immunised individuals… 17

Answer 8

are protected since there is less chance of being in contact with infected individuals

Question 9

(Herd immunity) d) The threshold of… , … and… 18

Answer 9

herd immunity depends on the density of population, effectiveness of vaccine and verulity of pathogen

Question 10

(Herd immunity) e) Problems can arise… and… 23

Answer 10

when widespread vaccination is not possible due to poverty in developing areas and rejection by a majority in developed areas