Rob: Two things are all that's needed for one person to save up to three people's lives, an hour of their time and a pint of their blood. Our Jessica Betts explains. Jessica: Every day, the American Red Cross is busy collecting blood from thousands of people willing to help someone they'll never meet. I met a woman named Lauren Larson at the Tulsa Red Cross, who is traveling all over the country with a personal message of survival and gratitude. With more than two hundred units of blood, Lauren's life was spared, and she's here to tell everyone why. Jessica: Five million people require a blood transfusion every year in this county. And 7years ago, Lauren Larson was one o them. Lauren Larson: I was pregnant for the first, and I assure you the last, time in my life, and I had a great pregnancy. I was very fit. I was a runner. I was a six-time marathoner, a non-smoker. I was the picture of health. Jessica: But something happened. Larson: I got very ill, and an emergency c-section was performed to save my baby, after which my body just shut down. And I spent six weeks in the intensive care unit during which time I received over 200 pints of donated blood, every last drop of it from complete strangers who took the time to go into a Red Cross and give of themselves for one hour. Jessica: Surviving a near death experience, and forever, grateful. Larson: I got out of that situation. It took me a year and a half to go through recovery, and it was during that time that I realized how grateful I was feeling, how fortunate I was. What if the blood hadn't been available in my community when I needed it? My little girl would be growing up without her mother. Jessica: And Larson has fallen in love with the cause that saved her life. Encouraging all who will, to donate what we may need one day. Larson: Statistically speaking, roughly 1 in 3 people will require a life saving blood transfusion at some point in their lives. So there's no escaping this issue. I can tell you that, the blood supply in this country has never been safer. I can tell you that with the amount of blood I received, which was more than 15 times my normal blood volume, if something was going to go wrong, we'd know it by now. Jessica: It's safe, and could save you, or someone you love. Larson: Ask yourself if you would endure that kind of a pinch to save the lives of one of the three most important people in your life.