(a)[2]
Describe ways to reduce the risk of a mother passing HIV to her infant.
(b(i))[2]
Using the data in Table 3.1, describe the effect of breastfeeding on the chance of developing an infection.
(b(ii))[1]
State the name of a blood cell that plays a part in the immune response.
(b(iii))[4]
Describe ways in which infants can obtain passive immunity.
(b(iv))[3]
Describe how immunity acquired by vaccination is different from passive immunity.