At 31, Elizabeth Holmes is the youngest female, self-made, multibillionaire in America, according to Forbes. The company Holmes created, Theranos, developed a home blood-testing kit that could challenge the business model of medical labs. 

This spring, she was invited by the White House to be a Presidential Ambassador for Global Entrepreneurship, where she’ll focus on attracting women to science, tech, engineering and math fields, as well as improving global public health.

Click the media player above to hear Elizabeth Holmes in conversation with Marketplace Morning Report host David Brancaccio.