There's been an incredible uptick of interest in public health since the Covid-19 pandemic. So we wanted to talk with a woman (and CNN Hero) who's had a long and widely admired career in public health. We wanted to ask: What's it like to work in public health? Dr. Roseanna Means, who created Health Care Without Walls to care for Boston's homeless women, recounts how work with refugees in Cambodia forever influenced her life. "I wanted to do something that involved social justice and something that's going to be more meaningful," she said, telling us she ultimately decided to give up a prestigious cardiology fellowship as a result. "I thought they were going to take my stethoscope and break it in the public ceremony." For anyone considering a career in public health, it's an inspirational story.