RSV. Respiratory syncytial virus is the most common cause of hospitalization for infants in the U.S. The respiratory virus usually spreads in fall and winter and produces cold-like symptoms, though it can be deadly for young children, causing tens of thousands of hospitalizations and hundreds of deaths a year. According to the National Foundation for Infectious Diseases, roughly 80% of children younger than 2 who are hospitalized with RSV have no identifiable risk factors. Long-awaited vaccines against the disease were introduced in 2023.
Hepatitis A. Hepatitis A vaccination, which was phased in beginning in the late 1990s and recommended for all toddlers starting in 2006, has led to a more than 90% drop in the disease since 1996. The foodborne virus, which causes a wretched illness, continues to plague adults, particularly people who are homeless or who abuse drugs or alcohol, with a total of 1,648 cases and 85 deaths reported in 2023.
Hepatitis B. The disease causes liver cancer, cirrhosis, and other serious illnesses and is particularly dangerous when contracted by babies and young children. The hepatitis B virus is transmitted through blood and other bodily fluids, even in microscopic amounts, and can survive on surfaces for a week. From 1990 to 2019, vaccination resulted in a 99% decline in reported cases of acute hepatitis B among children and teens. Liver cancer among American children has also plummeted as a result of universal childhood vaccination. But the hepatitis B virus is still around, with 2,000-3,000 acute cases reported annually among unvaccinated adults. More than 17,000 chronic hepatitis B diagnoses were reported in 2023. The CDC estimates about half of people infected don't know they have it.
Rotavirus. Before routine administration of the current rotavirus vaccines began in 2006, about 70,000 young children were hospitalized and 50 died every year from the virus. It was known as "winter vomiting syndrome," said Sean O'Leary, a pediatrician at the University of Colorado. "It was a miserable disease that we hardly see anymore." The virus is still common on surfaces that babies touch, however, and "if you lower immunization rates it will once again hospitalize children," Offit said.
Meningococcal vaccines. These have been required mainly for teenagers and college students, who are notably vulnerable to critical illness caused by the bacteria. About 600 to 1,000 cases of meningococcal disease are reported in the U.S. each year, but it kills more than 10% of those it sickens, and 1 in 5 survivors have permanent disabilities.
Flu and covid. The two respiratory viruses have each killed hundreds of children in recent years — though both tend to be much more severe in older adults. Flu is currently on the upswing in the United States, and last flu season the virus killed 289 children.
