What Causes a Cold Sore? Factors can include injury or stress.
How Drought Can Harm Your Health. Continue.
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Prevent Passing Germs. Here's what you can do.
Considering the Nasal Spray Flu Vaccine? Some people shouldn't get it, experts say.
New Flu Strain Weakened This Year’s Vaccine Protection, CDC Says
Small Drop In Measles Vaccinations Tied to Big Jump In Cases
Sixth Measles Case Confirmed in New Mexico Jail
Review of U.S. Measles Elimination Status Delayed Until November
U.S. Tops 1,100 Measles Cases This Year as Outbreaks Grow
Scientists' Push For a Universal Vaccine Takes a Key Step Forward
