Tetanus is a rare but dangerous disease. A doctor explains why experts are worried

Tetanus: A Modern Threat Despite Its Historical Roots

Tetanus is a rare but dangerous – Tetanus, often associated with old-world imagery of rusted nails and hospital visits, remains a significant health concern today. While it may seem like a relic of past medical challenges, recent data from the US Centers for Disease Control and Prevention (CDC) reveal that the disease is far from obsolete. Over the past 15 years, the CDC has documented hundreds of tetanus cases and dozens of fatalities, with four cases reported specifically in children in 2024. These numbers have experts sounding alarms, as declining vaccination rates leave more individuals susceptible to this potentially fatal infection. To delve deeper into the risks and preventive measures, I consulted Dr. Leana Wen, a CNN wellness expert and former Baltimore health commissioner, who shared insights on tetanus and its relevance in contemporary health care.

What Causes Tetanus and How It Spreads

Tetanus is caused by the bacterium Clostridium tetani, which produces spores capable of surviving in harsh environments. These spores are ubiquitous, found in soil, dust, and even animal manure. While the idea of tetanus from a rusty nail is common, the rust itself isn’t the culprit. Instead, it’s the contamination of such objects with the bacteria that poses a risk. Dr. Wen explained, “The spores enter the body through an injury, especially if it’s not cleaned thoroughly. Puncture wounds, lacerations, burns, or even minor cuts can act as entry points if they’re exposed to dirt or debris.” She emphasized that the disease is not limited to specific scenarios, as the CDC recently noted a range of injuries in children—such as an ankle fracture from an electric scooter accident or a foot injury—leading to tetanus infections.

“Nails and other objects are a concern because they may carry these bacterial spores, especially if they’ve been outdoors or in contact with soil,” Dr. Wen added.

The bacteria’s ability to thrive in environments like soil and manure makes it a persistent threat. Once inside the body, Clostridium tetani produces a potent toxin that targets the nervous system. This toxin, known as tetanospasmin, travels through the bloodstream and lymphatic system to affect the spinal cord and brain, leading to severe muscle stiffness and spasms. The process is gradual, often taking days to weeks for symptoms to manifest, which can delay treatment and worsen outcomes.

Recognizing the Signs of Tetanus

While tetanus is preventable, its symptoms can be alarming and life-threatening. Dr. Wen described the hallmark symptom as “lockjaw,” a condition where the jaw muscles become rigid, making swallowing difficult. However, she noted that tetanus can also cause stiffness in the neck, back, and other muscle groups, leading to painful spasms. These spasms may be so intense that they result in fractures or dislocations, especially in the spine or jaw. In severe cases, the disease can impair the muscles responsible for breathing, causing respiratory failure. “Some patients develop spasms of the vocal cords that block the airway, while others experience dangerous fluctuations in blood pressure or irregular heart rhythms,” she explained. The disease’s progression is unpredictable, and even with prompt medical intervention, recovery can take weeks or months.

The CDC reports that tetanus can strike anyone, but its severity is often linked to the type of injury and the individual’s vaccination status. For instance, a minor cut in a vaccinated person might not lead to infection, whereas a similar wound in an unvaccinated individual could develop into tetanus if not properly treated. Dr. Wen highlighted the importance of timely care, stating, “Clinicians must assess wounds for contamination and determine whether additional protection is necessary. This includes evaluating the need for a tetanus-containing vaccine or immune globulin, which provides immediate antibodies.” She stressed that delays in treatment can increase the risk of complications, as the toxin’s effects build up over time.

Prevention: The Role of Vaccination

Prevention is the key to combating tetanus. The American Academy of Pediatrics recommends a series of five tetanus-containing vaccines for children, starting at two months of age. Adolescents then receive a Tdap booster—covering tetanus, diphtheria, and pertussis—at 11 or 12 years. Adults are advised to get tetanus boosters every decade, but those with severe wounds or contaminated injuries should follow up sooner, according to the CDC. “Pregnant individuals should also receive the Tdap vaccine during each pregnancy to protect newborns from neonatal tetanus,” Dr. Wen noted. This underscores the broader impact of vaccination, not just on individuals but on entire communities.

Despite these guidelines, vaccination rates have dipped in recent years, raising concerns about public health preparedness. Dr. Wen pointed out that nearly half of tetanus cases in the CDC’s surveillance report involved individuals who had never received a tetanus vaccine. “This is a worrying trend,” she said. “When people skip their booster shots or fail to complete their initial vaccination series, they become more vulnerable to the disease.” She also emphasized that tetanus is preventable, yet it continues to claim lives due to lapses in immunization and delayed medical attention.

“Vaccination is not just a personal choice; it’s a critical public health measure. Every dose administered reduces the likelihood of outbreaks and protects those who cannot be vaccinated, such as newborns,” Dr. Wen stated.

The decline in vaccination rates has been attributed to various factors, including vaccine hesitancy, lack of awareness, and gaps in healthcare access. Dr. Wen warned that this trend could lead to a resurgence of tetanus cases, particularly among high-risk groups like children, the elderly, and those with chronic illnesses. She called for renewed efforts to educate the public about the importance of tetanus vaccines, especially in light of recent cases in children and the potential for the disease to progress rapidly. “The spores are everywhere, so staying up-to-date with immunizations is the best way to shield yourself and others from tetanus,” she concluded.

Who Is Most Vulnerable Today?

According to Dr. Wen, the primary risk factors for tetanus include incomplete vaccination series, age-related immunity loss, and exposure to contaminated environments. “The people most at risk are those who haven’t received their recommended doses or have missed boosters,” she said. Children, especially those with parents or caregivers who are not vaccinated, are particularly vulnerable. The CDC’s surveillance report revealed that in many cases, individuals lacked a clear vaccination history, making them susceptible to infection. Additionally, older adults, who may have received their last tetanus shot decades ago, are at higher risk due to waning immunity. “Even with a history of vaccination, people need regular boosters to maintain protection,” Wen emphasized.

Dr. Wen also highlighted that certain occupations and activities increase the likelihood of tetanus exposure. For example, farmers, construction workers, and individuals who frequently handle soil or animal waste are more prone to injuries that could introduce the bacteria. Furthermore, she warned that the rise of outdoor activities and the increasing use of electric scooters and other devices may contribute to more tetanus cases in younger populations. “These injuries, while seemingly minor, can become serious if not addressed promptly,” she noted. This highlights the need for vigilance in wound care and regular immunization, regardless of age or activity level.

Tetanus serves as a stark reminder of the importance of vaccines in modern medicine. While the disease is rare, its potential for rapid progression and severe complications makes it a critical public health issue. By maintaining vaccination schedules and seeking immediate medical attention for wounds, individuals can significantly reduce their risk. Dr. Wen’s insights underscore that tetanus is not just a historical disease but a contemporary threat, one that demands ongoing awareness and proactive prevention. “We cannot afford to let complacency lead to outbreaks,” she said. “Every person has a role in protecting themselves and their communities.”