9. Direct modes of disease transmission include: - a. Airborne b. Vector borne C. Fomites d. Droplet 10. Strategies of attacking the source in disease prevention include: __ a. Immunization b. Isolation C. Prophylaxis d. Personal hygiene 11. A relative risk of 1.2 denotes: - a. Astrong association between exposure and disease b. A negative association between exposure and disease C. No association between exposure and disease d. Positive association between exposure and disease 12. Vaccination to avoid spread of communicable disease is one of the strategies of: - a. Protecting the host b. Attacking the source C. Interrupting mode of transmission d. Reducing susceptibility 13. Indicate whether the following statements are True or False on the answer booklet p a. Numerators and denominators of a ratio can be related or unrelated b. The numerator and the denominator should be of the same nature in calculation proportions 14. Highprevalence of a disease is associatec I with: - a. Low incidence b. Short duration C. Improved survival d. Fast cure 15. The first step indisease outbreak management is: a. Verifying the outbreak b. Setting up an investigation team C. Confirming the nature of the disease d. Determining the nature of the outbreak 16. One of the following is correct regarding age-specific mortality rate: - a. It is an indicator of disease burden b. It is the mortality rate limited to a particular age group. C. The numerator is the total number of deaths in the population d. The denominator is the total population at mid-point of the time period