They might share many of the same symptoms, but the cold and the flu really are two very different things, starting with what causes them. Trace explains what you can and can't do when either of them comes calling your name.
One of the dominant flu strains infecting people now is a mutated form that the flu shot may not protect against.
While poking around peoples' throats studying microbes, scientists stumbled upon a microorganism present in half their subjects -- one previously seen only in green algae in freshwater lakes and one with the unfortunate effect of making you dumb.
Deadly contagious viruses can infect multiple animals, including humans.
Spats between politicians and the public over how to react to the Ebola virus may threaten public trust and could keep workers from going to Africa.
News that a doctor in New York with Ebola traveled on the subway the day before he developed symptoms of the disease may have some people worried about contracting Ebola on public transportation.
A doctor who recently returned to New York from treating Ebola patients in Guinea tests positive for the deadly virus.
Another Ebola victory: Nina Pham, the first nurse in Dallas to be infected with Ebola, is now free of the virus.
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