Majority of Americans go online for health information

A survey by the Pew Internet and American Life Project says that 61% of Americans turn to the web for health information.  And the majority this group have turned to user-generated health information. Here's a link to the report which I spotted thanks to an article by the always excellent Pauline Chen of the New York Times titled medicine in the age of Twitter. Signs of the times.
The basic unit of all living organisms. Full medical glossary
The basic unit of genetic material carried on chromosomes. Full medical glossary