The following video is part of our "Motley Fool Conversations" series, in which health-care editor/analyst David Williamson discusses topics across the investing world.

Is Gilead Sciences biotech's best stock?  David takes a closer look at the company's flagship HIV drug franchise and its up-and-coming hepatitis C drugs before deciding whether the company deserves to be crowned by investors as the industry's best. Watch and find out.

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