and scott nathan and laura debonis. >> my name is brittany smith, and i'm nine years old. it's tough because my mom and dad are poor. my dad just lost his job. it's kind of hard for us. monday i tried getting in the shower, and it was cold. i put the hot on all the way and no cold, and it was freezing. it felt like shoving your face in a bunch of snow. it was freezing! the hot water shut off because we didn't pay the bill in time. it was overdue. >> so what's the next bill due? >> electricity. it's going to be $318. we just need to put roger's ass to work. >> yeah. >> when you see the flat-screen tv and the computers and our ps3 and stuff, that's just things we've acquired over the years, stuff that we've had before all this happened, like when we were not this pr. >> sink's broke. i don't know how or why, but it broke. and the cheapest plumber is, like, $65 an hour. i can't even afford $20. >> we lived in a farmhouse. my dad lost his job from picture perfect. he got laid off, and we got kicked out of there. we moved he

with grants from scott nathan and laura debonis, and the hagler family. >> what a cute little face. aww, here we come. it's a girl! >> yeah! >> she's beautiful. >> what's her name? >> rachel. >> she's beautiful. she doesn't want to cry. >> narrator: a new life begins. >> congratulations. >> thank you. >> narrator: out of her mother's womb, rachel murphy is now surrounded by a new world filled with countless germs. modern medicine will do what it can to protect her. >> just a tiny little stick. >> narrator: barely an hour old, rachel gets her first shot against hepatitis b. this is the first of up to 35 inoculations she will get in the next six years of her life to fight 14 diseases. >> it's all right. it's okay, princess. >> narrator: public health doctors celebrate vaccines as one of medicine's shining achievements. >> that's all. you're okay. >> they've increased our life span by 30 years. hib would cause 20,000 to 25,000 cases a year: gone! i mean, polio would paralyze, you know, tens of thousands of children every year: gone! i mean, diphtheria was the most common killer of... o