(a)[1]
Explain what the term transmissible means.
(b)[2]
Fig. 5.1 shows a transmission electron micrograph of \textit{Vibrio cholerae}. A student wants to find the actual length of the flagellum visible in Fig. 5.1. State the information needed for the student to calculate the actual length of the flagellum.
(c(i))[1]
Complete Table 5.1 by working out the case-fatality rate for Yemen.
(c(ii))[5]
Suggest why major cholera outbreaks happened in the countries named in Table 5.1, while most of the other countries had very few cases.