Hand, Foot and Mouth Disease is a very common virus spread among children that are between the ages of 1 and 4, because it's spread through saliva, nasal secretions, and also feces, and so children of this age aren't really able to control all of those things very well.
And if the virus in those contaminants gets on a surface and someone else touches them and puts it in their mouth, then they get sick too.
It can make the child feel like they have the flu, they may run a fever, just act lethargic. A small child that's not able to communicate to you may just stop eating and drinking well, because they have blisters in their mouth that hurt.
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