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Immunization can prevent severe respiratory infections in children, reducing hospital admissions and deaths worldwide

A systematic review of the global burden of acute lower respiratory infections associated with seasonal influenza in children under 5 years found that just in 2018 these infections led to an estimated 870,000 hospital admissions and 15,300 in-hospital deaths. About 23% of these hospital admissions and 36% of the in-hospital deaths were in infants under 6 months and about 82% of the in-hospital deaths occurred in low-income and lower-middle-income countries.

Immunization against rotavirus significantly reduced hospitalizations and emergency visits in children

Prior to the introduction of rotavirus vaccines in the U.S., there were an estimated 205,000 – 272,000 emergency department visits and 55,000 – 70,000 hospitalizations due to rotavirus in children each year. A series of studies found that hospitalizations in children under five due to rotavirus declined, on average by 80% from the pre-vaccine to the post-vaccine era, while both outpatient visits and emergency department visits due to rotavirus declined 57%.

Immunization against rotavirus reduced hospitalizations in both children and adults via herd protection

Several studies in the U.S. have shown that hospitalizations due to rotavirus fell sharply in children too old to be vaccinated as well as in adults after rotavirus vaccines were introduced, indicating herd protection. In one large study, rotavirus hospitalizations in 2008 — two years after the first vaccine was introduced — declined by 71% in 5-14 year old children and by 65% in 15-24 year olds compared to the pre-vaccine period.

Immunization reduced hospitalization disparities for children from ethnic minorities

In New Zealand, Maori and Pacific children have historically suffered high hospitalization rates for invasive pneumococcal disease (IPD), all cause pneumonia (ACP), and otitis media. Following the introduction of conjugate vaccines in the country, Maori and Pacific children’s rates of admission for IPD dropped by 79% and 67%, respectively, while significant reductions in ACP and otitis media admissions were also noted, resulting in reductions in disparities for these populations.

Immunization can prevent common illnesses that strain hospital resources

In a Bangladeshi study, pneumonia and acute diarrhea were the first and third most common reasons for childhood hospital admission with over half (54%) of the acute diarrhea admissions caused by rotavirus. One in four children taken to this large pediatric hospital were refused admission because all beds were occupied. Vaccination could have prevented children with rotavirus from requiring essential hospital resources when one in four children refused admission had symptoms of pneumonia.

Immunization against rotavirus has led to significant decreases in hospital admissions and gastroenteritis cases

Several countries have seen a significant decrease in the number of rotavirus-related hospital admissions in rotavirus unvaccinated children ages 2-5 years who were not age eligible to receive the vaccine post introduction. The US had a 41-92% decrease, Australia had a 30-70% decrease, Belgium had a 20-64% decrease, Austria had a 35% reduction and El Salvador had a 41-81% decrease. In addition, there was a reduction in hospitalizations due to gastroenteritis of any cause by 17-51% in the US and 40% in Australia.

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