. >> kpix 5's sharon chen tells us it's all thanks to this week's jefferson award winner. >>reporter: when the big blue coat rolls in, setup takes about 45 minutes, then the teen health van is open, the doctor comes to you. >> i'm just going to listen to your heart. breathe normally. >>reporter: dr. seth emmerman is the doctor and founder of the health van, helping people like 22-year-old sandy with checkups and more. >> i was having trouble with headaches and migraines. i'm thankful that they're here. >>reporter: the teen health van stops twice a week, reaching homeless and low income 10 to 25 years old, mostly at schools from san francisco to san jose. the 18-year-old community outreach van of lucille packard children's hospital offers comprehensive, primary care for free. >> the kids that we work with, a lot of people have given up on them, but we haven't. >>reporter: since it started, the teen health van has seen more than 4,000 young people and more than 15,000 -- in more than 15,000 visits and dr. amerman says it's making a difference. >> we know that we can help tur