Shocking Comeback: This Rare Disease, Last Seen 10 Years Ago, is Spreading—Are You at Risk?

A deadly, vaccine-preventable disease is making a comeback in the United States, as vaccination rates among children continue to decline. The disease in question is caused by Haemophilus influenzae type b (Hib), a highly contagious bacterial infection that primarily affects children under the age of five. Alarmingly, as fewer babies are vaccinated each year, doctors are beginning to encounter cases of Hib that many haven't seen throughout their careers.

Before the introduction of the Hib vaccine in 1987, nearly 20,000 children were diagnosed with the illness annually, resulting in approximately 1,000 deaths and many more cases of permanent brain damage, according to the Centers for Disease Control and Prevention (CDC). However, vaccination rates have recently taken a downward turn. The CDC reported a decline in the percentage of infants receiving a full series of Hib vaccinations, dropping from 78.8% in 2019 to 77.6% in 2021.

It is crucial to note that, despite its name, the Haemophilus influenzae bacteria is not the same as the influenza virus that causes seasonal flu. Instead, Hib resides in the nose and throat and can spread through coughing and sneezing, leading to various infections, from mild conditions like ear infections and bronchitis to severe illnesses such as pneumonia, bloodstream infections, meningitis, and epiglottitis, which causes swelling of the throat.

Symptoms of Hib infection can range widely, including fever, chills, headache, fatigue, and in some cases, more severe manifestations, depending on the area of the body affected. As vaccination rates drop and states roll back vaccine mandates for schoolchildren, experts express concern that Hib could become a significant public health threat once again. “I’d never seen a case of Hib for years and years,” Dr. Eehab Kenawy, a pediatrician in Florida, stated in an interview with NBC. “Now I’m hearing about it.”

The rise in Hib cases is forcing healthcare providers to reconsider their diagnostic approaches. Doctors are increasingly adding Hib to their differential diagnoses when children present typical signs of bacterial infections. “We have to start thinking about these things as a differential diagnosis in our workup,” Dr. Kenawy explained. “It puts us in a situation where we may have to do more close observation, possibly more admissions, maybe some unnecessary workup at times. It’s the changing world of medicine.”

As of March 21, the CDC reported eight confirmed cases of Hib this year, with instances in Ohio, New York, Kansas, North Carolina, and Tennessee. In light of these developments, the CDC recommends that all children under age five receive three to four doses of the Hib vaccine, depending on the specific vaccine brand used. Studies have shown that this full series is at least 93% effective in preventing the bacterial illness.

However, the decline in Hib vaccinations is not an isolated issue. National vaccination rates are shrinking for other diseases as well, including measles, mumps, and rubella (MMR), and even polio. As more parents choose not to vaccinate their children, the potential for outbreaks of these infectious diseases increases, raising serious concerns among public health officials.

While the Hib vaccine has significantly reduced the incidence of serious illnesses, the recent trends indicate a pressing need for parents, healthcare providers, and policymakers to recommit to immunization efforts. The potential resurgence of Hib underscores the importance of timely vaccinations not just for individual children, but for the broader community's health as well.