A woman describes how she survived a vicious dog attack with the help of a stranger. Then, veterinarian Dr. Courtney Campbell explains what to do if you're confronted by an aggressive dog.
A 16-year-old girl explains how injuries she suffered when a tractor ran over her when she was 3 years old have affected her life.
Pfizer Chief Medical Officer Dr. Freda Lewis-Hall offers advice to college students for how to avoid bacterial meningitis as they go back to school.
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