the body's response to disease could have a smell

Here's something interesting I just read. A latest study conducted by the Karolinska Institutet in Sweden found that humans may be able to smell disease by being able to detect a distinct odor in the sweat of people with highly active immune systems. 

Okay, so the sample size of participants involved was very small, just 8. These 8 were injected with either a bacterial toxin (which produces a strong immune response) or salt water ( which produces no effect whatsoever). Four hours later, researchers collected participants' t-shirts (which had perspiration) and cut out the fabric under the armpits and put these into bottles. Once this was done, 40 university students smelled these samples and rated them according to the intensity, pleasantness and perceived "health" of the odor.

By the end of the study, it was found that students had rates the fabric of those injected with the bacteria to smell more unpleasant than the fabric of those injected with salt water.    

Quite interesting huh?