Overdose epidemic may have deeper social issues Video

  • Now Playing: Globally 25 percent of adults aren’t getting the recommended amount of exercise: WHO


  • Now Playing: New advice on kids’ concussions calls for better tracking




  • Now Playing: Behind the byline: Barbara Feder Ostrov on her Prudence Hall story




  • Now Playing: FDA calls e-cigarettes ‘an epidemic’ among minors




  • Now Playing: Amazing advancements against cancer, but not everyone benefits




  • Now Playing: Salmonella outbreak linked to popular cereal




  • Now Playing: What are probiotics?




  • Now Playing: Genetically modified mosquitoes could eradicate malaria




  • Now Playing: Breastfeeding linked to reduced risk of stroke later in life




  • Now Playing: ADHD rates in kids have increased over the past 20 years, new study says




  • Now Playing: Sleep loss can make people more isolated and lonely: Study




  • Now Playing: New ‘zombie’ gene found in elephants could help humans fight cancer




  • Now Playing: Living in the city may not be heart healthy: Study




  • Now Playing: Opioids after wisdom teeth removal might set young people up for addiction




  • Now Playing: Low-calorie diets affect men’s and women’s bodies differently, study shows




  • Now Playing: Boxers or briefs? Largest-ever study shows boxers may beat briefs for baby-making




  • Now Playing: Aspirin disappoints for avoiding first heart attack, stroke




  • Now Playing: New study cites ‘no safe level’ when it comes to alcohol consumption




  • Now Playing: As teens turn to cosmetic surgery, study outlines new age-appropriate guidelines




  • Now Playing: Alcohol-based hand sanitizers: can they backfire?