Is hand, foot and mouth disease contagious to adults?
Last updated September 3, 2026.
Yes - adults can catch and spread it, though it mostly hits children under 5 and is usually not serious. Many adults are immune from childhood infections; those who get sick usually run milder. The CDC calls it very contagious - spread through saliva, blister fluid, stool, and droplets - and people are most contagious in the first week, with stool shedding lasting weeks after. Pregnant people near delivery and the immunocompromised should mention exposure to their doctor.
What to do
- Wash hands after diapers and noses. Stool and saliva are the routes in a household with a sick child.
- Disinfect the shared objects. Toys and doorknobs carry it between siblings.
- Do not share cups or utensils. Saliva spreads it efficiently.
- Mention exposure if pregnant or immunocompromised. Your doctor will want to know, especially near delivery.