Using the ‘without HIV/AIDS’ and ‘with HIV/AIDS’ figures in Table 3.1, calculate the percentage fall in life expectancy for Botswana. Show your working and round your answer to the nearest whole number.
Suggest two reasons for the differences in estimated life expectancy without HIV/AIDS among the various African countries.
Using Table 3.1, explain why the data do not completely support the student’s claim that there is a correlation between the percentage of the population testing positive for HIV and the fall in estimated life expectancy with HIV/AIDS.
State two measures used in the prevention and control of HIV/AIDS that would help to improve average life expectancy in the African countries shown in Table 3.1.
A person who is confirmed as HIV-positive has tested positive for antibodies to HIV. Outline the events that take place in a newly infected person and lead to the production of antibodies to HIV.