The diagram illustrates several pathogens that lead to disease in humans and also shows some of the ways they spread. The pathogen types are labelled as follows: 1 bacterium, 2 protoctist, 3 virus. The transmission methods are labelled: X contaminated water, Y coughs and sneezes, Z using a vector. Which row gives the correct number for the pathogen together with the correct letter for its transmission route for cholera and measles?
Biology 9700 · AS & A Level · Infectious diseases