Vaccines enable your body's immune system protect you from disease. They have saved millions of lives around the world. This show looks at how vaccines are created, how they work and some needle-free vaccines that may become available.
Part one of this two-part program addresses the following topics:
Dr. Karen Kotloff, a pediatrician at the University of Maryland Hospital for Children. She is one of the nation's top vaccine experts and a professor of pediatrics at the University of Maryland School of Medicine. She works in the University of Maryland Center for Vaccine Development.