You think only IT guys screw up , how about guys who store viruses and bacteria.

The first paragraph from the article:
The same federal scientist who recently found forgotten samples of smallpox at a federal lab also uncovered over 300 additional vials, many bearing the names of highly contagious viruses and bacteria.


The link below has more information:-

http://www.koaa.com/news/300-vials-labeled-influenza-dengue-found-at-lab/