(a(i))[1]
HIV infection can lead to AIDS. State what the letters HIV stand for.
(a(ii))[3]
Describe ways of lowering the chance of a person becoming infected with HIV.
(b(i))[2]
The statements below are conclusions. Place ticks (✓) in the boxes to identify the two correct conclusions from the data in Table 7.1.
(b(ii))[1]
Syphilis can be treated with antibiotics. Suggest the kind of organism responsible for syphilis.