science
Recent Hib Bacterial Disease Cases Reported in U.S.
Haemophilus influenzae type B, or Hib, once affected about 20,000 children annually in the United States before the vaccine's introduction. Recent cases in unvaccinated children have prompted concerns among doctors, with the CDC reporting fewer than 50 cases per year currently. Health experts highlight the disease's potential for severe outcomes like meningitis and death.
Apr 4, 2:51 PM·2m read1 source
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Haemophilus influenzae type B, known as Hib, is a bacterial infection that spreads through respiratory droplets from coughing or sneezing. Before the vaccine was introduced more than three decades ago, it impacted approximately 20,000 children in the United States each year.
Invasive Hib infections often affected infants and toddlers, leading to conditions such as pneumonia, meningitis, septic arthritis, blood infections, and throat swelling, which resulted in permanent disabilities or death in about 5% of cases, or roughly 1,000 children annually.
The Hib vaccine, recommended for all children younger than 5, has significantly reduced cases since its introduction. Infants typically receive three or four doses starting at 2 months old. According to the U.S. Centers for Disease Control and Prevention, the vaccine has led to a more than 99% reduction, with fewer than 50 cases reported per year currently.
USA Today reported recent cases of Hib in unvaccinated children, including two severe instances in Panama City, Florida, in 2025. One case involved an unvaccinated 4-month-old who died, and another was an unvaccinated 2-year-old who developed brain abscesses, seizures, and lasting effects.
Both children were visiting from out of state, and Dr. Eehab Kenawy, a pediatrician in Panama City, noted these cases during a state Department of Health conference in December.
Additional cases were presented at Vanderbilt University Medical Center in Tennessee, where doctors recently treated two instances of Hib. Dr. Kathryn Edwards, a vaccine safety expert and pediatrics professor emerita there, stated that parents and doctors need to be aware of the risks of unvaccinated children acquiring serious diseases.
Dr. ' in March, questioning potential trends.
The CDC, through spokesperson Andrew Nixon of the U.S. Department of Health and Human Services, stated as of March 28 that there were eight cases this year and no increase in preventable invasive Hib infections among children. Dozens of states have exemptions for routine vaccinations based on religion or personal beliefs.
