Thanks to vaccination, tetanus is rare among America's horses, but it does occur. "I wish there were zero cases," says Simon Peek, clinical professor of large animal internal medicine, theriogenology and infectious diseases. "It's such a horrible disease that we'd prefer to never see it again. Yet we continue to have sporadic cases, and it's always tragic when we do." Peek recently spoke with EQUUS magazine about defense against tetanus (the frontline of which is vaccination), when horses are most at risk and why, and treatment for the disease.