What is meant by a clinical trial as a type of experimental epidemiological study design?

Each question must be answered in 200 words each

 

What is meant by a clinical trial as a type of experimental epidemiological study design? Provide at least one relevant example

Your response must be at least 200 words in length.

What is meant by a community trial as a type of experimental epidemiological study design? Provide at least one relevant example.

Your response must be at least 200 words in length.

What is meant by an intervention study as a type of experimental epidemiological study design? Provide at least one relevant example.

Your response must be at least 200 words in length.

Discuss temporal differences in cohort designs for epidemiologic research. Why is this aspect important to consider?

Your response must be at least 200 words in length.