Cold sores are painful blisters that appear on or around the lips. Learn what causes cold sores in this article.
Flu is short for influenza virus. Learn how the flu virus works and why antibiotics won't help you fight it. See more »
There are several SARS conspiracy theories, including the act of biological warfare by the United States. Learn more about the SARS conspiracy theory from this article. See more »
During the SARS outbreak of 2003-2004, high risk areas included China, Taiwan and Canada. Learn more about the high risk SARS areas from this article. See more »
SARS originated in the Guangdong province of China in 2002. Learn more about the origins of SARS from this article. See more »