George Washington University MPH 6003 Quiz 3 1)The major factor responsible for the Epidemiological Transition” has been?   Which of the following is not an example of vector in disease transmission?     Which of this measure can be used to describe the incidence of the disease among people exposed to a primary case?   A vaccine efficacy of 90% implies that     The most important predictor of influenzas risk is generally   A surveillance system that has its main goal the early detection of health problems or outbreaks, even before there is an official diagnosis of any illness, or reports of “cases”   Women who had a caesarean delivery and an equal number of women who did not have a c-section were recruited from a hospital obstetrics ward to participate in a study looking at the association between c-sections and exercise during pregnancy