You can get hand, foot, and mouth disease more than once, and there is no fixed limit on the number of times it can happen. Each infection typically builds immunity only against the specific viral strain that caused it, leaving you vulnerable to the other strains that also cause the illness. In practice, though, repeat infections are uncommon: a large study tracking over 900,000 cases in China found the probability of getting it again was about 1.9% within 12 months and roughly 4% within three years.
Why You Can Get It More Than Once
Hand, foot, and mouth disease isn’t caused by a single virus. It’s caused by a group of viruses called nonpolio enteroviruses. The most common culprit is coxsackievirus A16, but coxsackievirus A6, enterovirus A71, and several others can all trigger the same illness. After you recover from one strain, your body produces antibodies that protect you against that particular strain, but those antibodies do little against the others.
This is why repeat infections almost always involve a different strain than the first one. Data from the Chinese epidemiological study bears this out clearly. Among children whose first infection was caused by enterovirus A71, the rate of reinfection with the same strain was extremely low (0.05%), while reinfection with coxsackievirus A16 or other enteroviruses was two to three times more likely. The pattern held in reverse for children whose first infection was coxsackievirus A16. In short, catching one strain doesn’t meaningfully protect you from another.
How Common Reinfection Actually Is
Despite the theoretical possibility of catching it many times, repeat infections are relatively rare. In the large-scale study covering cases from 2008 to 2015, the cumulative chance of a second episode was about 3.3% within two years and plateaued near 4% after three years. So while it definitely happens, the vast majority of children who get it once don’t get it again in the near term.
Getting it twice in the same season is especially unusual. Your immune system is actively fighting and shedding the virus for weeks after symptoms clear, which provides a short window of broader immune activity. Repeat infections tend to be spaced months or years apart, often triggered by a different strain circulating in a new season.
Adults vs. Children
Most adults have built up immunity to many of the common strains through years of low-level exposure. This is why the disease overwhelmingly affects children under five. But adults can and do get it, particularly when a less common strain circulates or when they’re exposed heavily through caring for a sick child. When adults do catch it, symptoms are usually milder, though they can still spread the virus to others.
A second or third infection at any age also tends to be milder than the first, since partial cross-reactivity between related strains can blunt the severity even when it doesn’t fully prevent infection.
Why a Second Case Can Look Different
If your child (or you) gets hand, foot, and mouth disease again and it looks nothing like the first time, the strain is likely different. Coxsackievirus A6, which has become more common in recent years, causes an atypical presentation that can look alarming. Instead of the classic small blisters on the palms, soles, and inside the mouth, A6 can produce a widespread rash across the arms, legs, trunk, buttocks, and even the genital area. The rash sometimes resembles chickenpox.
One distinctive feature of A6 infections is nail shedding. Fingernails or toenails may peel or fall off about a month after symptoms resolve. This looks dramatic but is painless, and the nails grow back normally. Because these atypical presentations look so different from a typical case, parents sometimes don’t realize it’s the same disease.
The Contagious Window
Understanding how the virus spreads helps explain why household reinfection is so common when different family members catch different strains at different times. A person with hand, foot, and mouth disease is most contagious during the first week of illness. But the virus can continue to spread for days or weeks after symptoms disappear, and some people spread it without ever developing symptoms at all.
The virus lingers especially long in stool. Studies on enterovirus shedding in children have found the virus present in feces for 6 to 11 weeks after the initial infection, even in children with healthy immune systems. During that window, diaper changes, shared bathrooms, and imperfect handwashing all create opportunities for transmission. The virus also survives on surfaces for extended periods under the right conditions, which is why outbreaks cluster in daycare settings where toys and surfaces are shared constantly.
Reducing the Chances of Reinfection
There is no vaccine widely available for hand, foot, and mouth disease. Prevention comes down to hygiene, particularly during and after an active case in the household. Thorough handwashing after diaper changes, toilet use, and before preparing food matters most. Cleaning shared surfaces and toys with disinfectant during an outbreak helps, but the long fecal shedding period means you’d need to keep up those habits for weeks after the sick person feels better.
Keeping a sick child home during the first week of illness reduces spread at school or daycare, but it won’t eliminate it entirely because of asymptomatic shedding. And because each new season can bring a different circulating strain, a child who had it last year has no guaranteed protection this year. The good news is that with each infection, the immune system’s library of antibodies grows, which is why older children and adults are progressively less likely to catch it.