Due to genetic and environmental variation, symptoms and damage from exposure to mold and mycotoxins can be quite different from person to person. And because of the variability of symptoms (even within the same family) mold and mycotoxin exposure can often go undiagnosed. Common bodily damage is associated with mold and mycotoxin exposure. These microbes can have an intense effect on human immunity when exposed. Learn how to spot symptoms and know when to use testing.