Certain groups of people are more at risk from being infected with HIV.
(i) Identify TWO groups of people who are more at risk and for each group, state how infection can be prevented.
Group 1
Precaution
Group 2
Precaution
[ 4 ]
(ii) Vaccines against viral infections are difficult to develop. Suggest why.
[ 2 ]
(iii) SARS (Severe Acute Respiratory Syndrome), a viral infection that affects the respiratory system, was feared as a new Pandemic infection. Suggest what is meant by Pandemic.
[ 1 ]
(iv) Suggest why it is difficult to control a pandemic infection.
[ 2 ]
[Total: 8]
