(a)[5]
Use the details in Fig. 2.1 to finish Table 2.1.
(b(i))[1]
State the name of a pathogen transmitted through direct contact with blood.
(b(ii))[2]
State two ways a pathogen may be passed on indirectly.
(c)[3]
Describe the role of antibodies in defence against pathogens.
(d)[3]
Explain how active immunity is different from passive immunity.