Provided are a summary of the major points, plus three relevant references.
The major source of virus for foodborne disease is humans. Virus is spread by the fecal-oral route, so the ultimate source of the virus is fecal material from an infected individual. Fecal contamination of food or water leads to the virus infection being spread to other individuals. In developing countries it is easy to see how fecal contamination can occur, as poor sanitation can lead to obvious environmental contamination. In more developed countries, contamination is more likely through the fingers, for example by poor handwashing technique after using the bathroom. Several measures can be taken to reduce the risks of transmitting virus in food or water:
This solution addresses in detail the major viral causes of foodborne disease. It also provides details of ways to prevent these diseases, and provides references for several relevant sources.