Virology - What is a virus?
Channel: Proven Health Benefits - Healthy with Science
Date: 2014-02-27

Introductory lecture to the undergraduate virology course 2013 from Colombia University by Vincent Racaniello, Ph.D., Higgins Professor of Microbiology & Immunology.

The actual lecture starts about 6 minutes in:
http://youtu.be/nJrmQlwWl-I?t=6m40s

Jump to the section "What is a virus":
http://youtu.be/nJrmQlwWl-I?t=27m44s

Video published under the CC license, original source: 
http://www.youtube.com/profvrr