Now Playing: Teen paralyzed in Washington train derailment discusses accident
Now Playing: Rare illness targeting children
Now Playing: What are Typhus Fevers?
Now Playing: Women donate their hair to breast cancer survivors live on ‘GMA’
Now Playing: Nutritionist Rachel Beller demos antioxidant-rich recipes to stay healthy and strong
Now Playing: Gisele Bundchen shares the drink recipe that is her secret wellness weapon
Now Playing: Dr. Ian Smith shares his stress-busting tips
Now Playing: Sandra Lee opens up about her breast cancer journey
Now Playing: How one bride lost more than 60 pounds before her wedding
Now Playing: 3-year-old girl gets a life-saving birthday gift: a new liver and kidney
Now Playing: What is ricin?
Now Playing: Serena Williams recorded a version of ‘I Touch Myself’ for breast cancer awareness
Now Playing: What to know about the latest breakthroughs in breast cancer research
Now Playing: How to kick the junk food habit for good
Now Playing: 5 things celeb trainer Simone De La Rue does daily
Now Playing: Too much screen time, too little sleep linked to child development problems: Study
Now Playing: ‘GMA’ Hot List: Birth control linked to lower ovarian cancer risk
Now Playing: A speech therapy session with US’s youngest face transplant recipient
Now Playing: Newer hormonal birth control linked to lower ovarian cancer risk: Study
Now Playing: First lady breaks silence on Kavanaugh
Read More