Furthermore, she points to evidence that the more someone is exposed to these chemicals the graver their future sickness tends to be.

ECONOMIST: Was Gulf-war syndrome caused by chemical poisoning?

Salmonella infections lead to diarrhea, fever and abdominal cramps between 12 and 72 hours after someone is exposed to the bacteria, and the sickness can last from four to seven days, according to health officials.

CNN: Officials seek source of salmonella outbreak

The problem is that it is not always possible to tell if someone has been exposed or not.

ECONOMIST: REPORTS

But using those services means confidential data is stored on someone else's servers, where it can be exposed to anyone who subpoenas it from Google (nasdaq: GOOG - news - people ) or Yahoo!

FORBES: Accounting For Human Error

It is so contagious, that very few unimmunized individuals escape this common disease when they are exposed to someone with active chicken pox.

FORBES: Why Chicken Pox Can Be So Dangerous