(a)[2]
Define what is meant by the term transmissible disease.
(b)[2]
One effect of meningitis is that nerve impulses slow down. State what is meant by a nerve impulse.
(c(i))[4]
Explain how vaccination gives active immunity.
(c(ii))[2]
If meningitis disappears from a country, explain why the vaccine should still be used there.
(d(i))[2]
Suggest why the antibodies have to be injected instead of being taken by mouth.
(d(ii))[2]
Explain why passive immunity does not provide long-term protection against diseases, such as meningitis.