(a(i))[3]
Using Fig. 4.1, describe how the number of people newly infected with HIV changes over time.
(a(ii))[3]
Suggest reasons that might account for the fall in the number of people newly infected with HIV.
(b)[1]
Explain why it was important to show the upper and lower estimates on the graph in Fig. 4.1.
(c)[4]
Using the information in Fig. 4.1 and Fig. 4.2, explain the connection between new HIV infections and deaths due to HIV/AIDS.