Human infection with foot and mouth disease (FMD) from animals is technically possible but extraordinarily rare. Fewer than 50 cases have ever been documented worldwide, and every confirmed case involved close, direct contact with infected livestock. For the vast majority of people, FMD poses no meaningful health risk. What most people actually encounter, especially in children, is a completely different illness called hand, foot, and mouth disease (HFMD), caused by a separate virus that has nothing to do with animals.
Two Different Diseases With Confusing Names
The single biggest source of confusion around this topic is the name. Foot and mouth disease in animals and hand, foot, and mouth disease in humans sound nearly identical, but they are caused by entirely different viruses and are not related beyond both belonging to the same broad viral family (Picornaviridae).
Animal FMD is caused by a virus called Aphthovirus. It primarily infects cloven-hoofed animals like cattle, sheep, pigs, and goats. It spreads explosively through herds, causing blisters in the mouth and on the hooves, along with lameness, fever, and steep drops in milk production. Outbreaks trigger massive economic losses and often lead to culling of entire herds.
Human HFMD is caused by coxsackievirus A16 or, less commonly, enterovirus 71. It spreads person to person, mostly among children under 10, through the oral-fecal route or contact with saliva and blister fluid. Symptoms include fever, painful mouth sores, and a flat or slightly raised rash on the palms, soles of the feet, and sometimes the buttocks and legs. Most children recover in 7 to 10 days without any treatment. This virus cannot infect animals.
So if your child has been diagnosed with HFMD, the family pet or nearby farm animals are not the source, and they cannot catch it either.
How Humans Can (Rarely) Catch Animal FMD
In the handful of documented cases where a person actually contracted the animal version of FMD, every single one involved close contact with infected livestock. The people affected were farmers, veterinarians, or slaughterhouse workers who handled sick animals directly, touching open blisters, mucous membranes, or contaminated materials without protective equipment.
One notable historical case dates back to 1834, when three veterinarians deliberately drank raw milk from infected cows and developed the disease. That experiment, ethically unthinkable today, demonstrated that the virus can survive in unpasteurized milk. More recent laboratory research has confirmed this: the FMD virus can persist in raw milk even after standard pasteurization at 72°C for several minutes. In cream, the virus survived heating at 93°C for up to 25 minutes. However, commercially processed dairy products go through additional safety steps, and no modern cases of human infection through store-bought milk or food have been recorded.
The virus can also spread on wind currents and be carried mechanically on clothing, vehicles, and equipment, which is why outbreak containment in livestock focuses heavily on restricting movement of people and animals. But airborne exposure has not been linked to any confirmed human case.
What Human FMD Infection Looks Like
On the rare occasion that a person does contract the animal virus, the illness is mild. It produces a brief, low-level viral infection in the blood along with blistering, typically in the mouth and on the hands or feet. The symptoms resemble a less severe version of what the animals experience. There are no documented deaths, no long-term complications, and no evidence of person-to-person spread of the animal virus.
Because the symptoms overlap with HFMD and other blister-causing conditions, diagnosis in humans relies on laboratory testing, specifically PCR-based methods that can identify the exact virus involved. In practice, though, human cases are so uncommon that most physicians would never encounter one in their career.
Why the Risk Stays So Low
Several factors keep human FMD infections vanishingly rare. First, the virus is poorly adapted to human cells. It binds efficiently to receptors on the cells of cattle and other cloven-hoofed animals but does not replicate well in humans, which is why even direct exposure usually leads to nothing.
Second, modern food safety practices eliminate most dietary exposure. Pasteurization, cooking, and commercial processing destroy or reduce the virus in meat and dairy products. The risk exists primarily with raw, unpasteurized milk from an actively infected animal, a scenario that is already uncommon in countries with strong food safety regulation.
Third, during major FMD outbreaks in livestock, authorities impose strict quarantine and movement restrictions. Infected animals are typically culled, contaminated materials are destroyed, and farms are disinfected. These measures are designed to protect animal herds and agricultural economies, but they also reduce any theoretical human exposure window.
Who Faces the Most Exposure
The only people with any realistic risk are those who work hands-on with potentially infected livestock in regions where FMD circulates. This includes farmers, veterinarians, livestock traders, and slaughterhouse workers, particularly in parts of Africa, Asia, and South America where the virus is endemic and biosecurity measures may be limited.
In countries like Pakistan, where FMD remains widespread, studies have found that poor quarantine enforcement, unregulated animal movement across borders, and mixing of herds at open grazing sites and markets all contribute to ongoing viral circulation among animals. Livestock traders in these areas sometimes sell visibly sick animals at reduced prices rather than reporting cases, which keeps the virus moving through markets. Even in these high-exposure settings, human infection remains a curiosity rather than a public health concern.
For people in North America, Europe, Australia, and other regions that are either FMD-free or have strong containment protocols, the risk of human infection is essentially zero.
The Bottom Line on Risk
If you are worried because a child in your household has mouth sores and a rash on the hands and feet, the cause is almost certainly HFMD, the common childhood virus spread between people. It is not connected to animals in any way. If you work closely with livestock in a region experiencing an FMD outbreak, basic protective measures like gloves and avoiding contact with blisters or raw milk from sick animals are sufficient to prevent the already tiny risk of infection.