(a(i))[2]
Explain what the term non-infectious disease means.
(a(ii))[4]
In a person with lung cancer, one or more healthy cells change to become cancerous cells that can develop into a tumour. Suggest and explain the cellular changes that occur during the development of lung cancer.
(b(i))[2]
Name the kind of pathogen shown by $A$ and $B$ in Fig. 5.1.
(b(ii))[1]
State the mode of transmission shown by $C$ in Fig. 5.1.
(b(iii))[1]
Name the disease shown at $D$ in Fig. 5.1.
(b(iv))[1]
Name the causative organism shown by $E$ in Fig. 5.1.
(c)[3]
Explain how vaccination helps control infectious diseases.