3 marksVectors, Microorganism Control and Immunity

CSEC Human and Social Biology · May/June 2012 · Paper 2 · Question 6(b)

Explain in detail how a visit from one infected person can lead to a fresh outbreak of malaria in a territory where it has been eradicated.

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6(a)(i)Name the vector responsible for the spread of dengue fever, and state TWO signs or symptoms of the disease.[3 marks]
6(a)(ii)State TWO measures taken by health authorities, and ONE measure taken by households, to control the spread of dengue fever.[3 marks]
6(c)Explain how knowledge of passive and active immunity may be used to protect an individual from contracting malaria, comparing the advantages and disadvantages…[6 marks]

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