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The video could explain Dr. Dowell’s interest in his work.

Explanation:

An interview is a discussion between an interviewer an interviewee that aims to shed more light on a particular topic.

In this instance when trying to gain information from Dr. Dowell's expertise, the best way is to do a video that explains Dr. Dowell's interest in his work.

By discussing his interest in the topic the audience will be able to get a lot of information.

The interviewer can ask probing questions that will give more insight on the topic of infectious disease transmission.