Which of the following best defines \text{epidemiology}?
Question 2
What is the primary purpose of \text{disease surveillance}?
Question 3
A study that compares a group of individuals with a disease (cases) to a group without the disease (controls) to identify past exposures is known as a $\text{_______}$ study.
Question 4
Which of the following is a measure of \text{disease frequency} that represents the number of new cases of a disease in a population over a specified period?
Question 5
What is $\text{bias}$ in an epidemiological study?
