QUESTION 1 [20] 1.1 Explain why respiratory viral diseases are so difficult to control. In your response, outline the influence that the viral diseases have on the development of vaccines to prevent these diseases. (10) 1.2 In your own words, explain what “herd immunity’’ is and how it relates to mandatory vaccination. (10) QUESTION 2 [20] 2.1 Discuss how Vibrio cholerae uses quorum sensing for […]