Scientists work with volunteers in a clinical trial to find out how well a medicine or treatment works.
Even though they don't produce tobacco smoke, e-cigarettes are harmful in other ways.
Drug use and addiction can lead to problems for the person using drugs and for family members, too.
Decreasing the amount of nicotine in cigarettes could help reduce the health risks of smoking.
Emily Garcia shares her thoughts about the important role parents play in safely storing medicines and about her love for science.