You can fight off an infectious disease in one of two ways, by catching and surviving the disease or by getting a vaccine, which prevents you from catching it.
Find out how much you know about the causes and treatment of impotence.
Infant Immunization Quiz
A pregnant woman passes antibodies to her unborn baby through the placenta to protect against certain diseases. How long does this natural immunity last?
Inhalant Abuse Quiz
A surprisingly large number of American teenagers experiment with intoxicating inhalants, resulting in an untold number of deaths. Find out more about inhalant abuse by taking this quiz.
International Travel Quiz
Answer this one: How far in advance of your overseas trip should you visit your doctor for vaccines?