Is mold dangerous?

It can be. Everyone responds differently. Young children, older adults, and those who, for other reasons, have weakened immune systems are especially vulnerable.
If you think you have a mold problem in your home, you do not need to find out what type of mold you may have. All molds should be treated the same when it comes to health risks and removal. All indoor mold growth should be removed promptly, no matter what type(s) of mold is present or whether it can produce mycotoxins (aka “Toxic Mold”).