Measles is a communicable disease. The proportion of the population in a country that had been vaccinated against measles was measured, and the number of confirmed measles cases in that country was also noted. Fig. 5.1 presents the data gathered from 1975 to 2010.
(a(i))[2]
Calculate the percentage alteration in the number of measles cases from 1980 to 1990.
(a(ii))[4]
Describe the information shown in Fig. 5.1.
(a(iii))[5]
Explain how vaccination helps protect individuals against a transmissible disease such as measles.
(b(i))[2]
State two chemical barriers in the body that act against pathogens.
(b(ii))[3]
Describe how blood clotting occurs.
Worked solution & mark scheme
This 16-mark question has a full step-by-step worked solution and mark scheme. One marking point: “(140000 - 14000) / 140000 \times 100” …