A study seeks to determine if fish oil is effective at preventing heart attacks. Scientists interview 200 people and ask about h
eart attacks in the past 3 years. 120 people take fish oil regularly, whereas the 80 who do not take fish oil are referred to as the "control group." The above is an example of _________.
Epidemiology may be defined as the sub field of immunology that mainly deals with the study of the particular disease especially in the group of population of human beings.
The epidemiology includes the main reason of the disease, its cause and its medication. In the given example, the scientists study about the heart rate incident in the population. Later, the regular effect of the fish oil is also noticed in the population. This study clearly indicates the epidemiological study.
Thus, the correct answer is epidemiological study.
