How can immunity to a pathogen by a large proportion of the population protect the non-immune members of the population from acquiring a disease?Will this herd immunity work for diseases that have a common source such as water? Why or why not?
Describe the major medical and public health measures developed in the twentieth century that were instrumental for controlling the spread of infectious diseases in developed countries.
List with brief explanation five most common causes of mortality due to infectious diseases throughout the world. Are any of these diseases preventable by immunization?
Distinguish between mortality and morbidity, prevalence and incidence, and epidemic and pandemic as these terms relate to infectious diseases.Explain the difference between chronic carrier and acute carrier of an infectious disease.
Give example of host-to-host transmission of disease via direct contact and indirect host-to-host transmission of disease via vector agents and fomites. Travelling to developing countries increases some exposure to infectious diseases. What general precautions should you take before, during and after visits to developing countries when you return from a foreign country? Are you a disease risk to your family or your country? Explain.