When hand-foot-mouth is caught by both children and adults, how long does it last?

7-10 days: Hand-foot & mouth disease (hfmd) is a viral illness, most often affecting children, but may also affect adults. Most pnts. Recover in 7-10 days. There are very rarely serious complications, but these can be severe. It is most contagious during the 1st week after exposure, so practice good virual hygiene (wash hands, limits personal contact)>.