If a child has hand, foot, mouth disease and has blisters that are still erupting, but no fever. is he or she contagious or no?

Hand/foot/mouth: Generally, a person with hand, foot, and mouth disease is most contagious during the first week of illness. People can sometimes be contagious for days or weeks after symptoms go away. This is why people should always try to maintain good hygiene (e.g. handwashing) so they can minimize their chance of spreading or getting infections.