Influenza, commonly known as "the flu", is an infectious disease caused by an influenza virus.
|This science article is a stub. You can help Wikiquote by expanding it.|
- Waterbirds, to an influenza researcher, are more than majestic swans and charming mallards. They are instead stealthy vectors of novel influenza viruses, some of nature's bioterrorist agents, chauffeuring dangerous microbes from place to place.