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A universal infant rotavirus vaccine program in two delivery models: Effectiveness and adverse events following
Carolyn Sanford1, Joanne M Langley, Scott A Halperin
1a Department of Health and Wellness ; Charlottetown , Prince Edward Island.
Insights
High-coverage rotavirus vaccination programs in Canadian infants significantly reduced hospitalizations for rotavirus. Low-coverage or no-vaccination programs showed no reduction, and no safety concerns like intussusception were observed.
Area of Science:
- Pediatric Infectious Diseases
- Vaccinology
- Public Health
Background:
- Rotavirus is a leading cause of severe diarrhea and hospitalization in young children globally.
- Rotavirus vaccines are available in Canada, but their implementation varies across provinces.
- Understanding the real-world impact of universal vaccination programs is crucial for public health policy.
Purpose of the Study:
- To evaluate the effectiveness of universal infant rotavirus vaccination programs in reducing rotavirus-related hospitalizations.
- To assess the safety of rotavirus vaccines, specifically monitoring for intussusception and all-cause diarrhea.
- To compare outcomes in areas with high vaccine coverage versus low or no coverage.
Main Methods:
- A controlled trial involving two intervention sites implementing universal infant rotavirus vaccination (at 2 and 4 months) and one control site.
- Monitoring of vaccine coverage, rotavirus hospitalizations, intussusception cases, and all-cause diarrhea rates.
- Analysis of data 12 months post-implementation of vaccination programs.
Main Results:
- Universal rotavirus vaccination programs achieving >90% coverage were associated with a complete reduction in rotavirus hospitalizations in infants under 2 years.
- Sites with <40% vaccine coverage and the control site showed no significant reduction in rotavirus hospitalizations.
- No cases of intussusception or increase in all-cause diarrhea were linked to the rotavirus vaccine.
Conclusions:
- High-coverage universal infant rotavirus vaccination programs are highly effective in preventing rotavirus hospitalizations.
- Rotavirus vaccination demonstrates a favorable safety profile with no observed increase in intussusception or general diarrhea.
- Public health strategies emphasizing high vaccine uptake are essential for maximizing the benefits of rotavirus immunization programs.
Abstract:
Rotavirus is the most common cause of diarrhea leading to hospitalization in young children. Rotavirus vaccines are available in Canada but have not been introduced in all provinces. In a controlled trial, 2 study sites (Prince Edward Island and the Capital District Health Authority (District 9, Nova Scotia) introduced universal rotavirus vaccine programs for infants at 2 and 4 months of age beginning 1 December 2010, using public health nurse or general practitioner-delivery models, respectively. A third site (Saint John, NB) served as the non-intervention control setting. Vaccine coverage, rotavirus hospitalizations, intussusception and all-cause diarrhea were monitored. A universal rotavirus vaccine program with >90% coverage was associated with reductions in rotavirus-associated hospitalizations (from a peak of 52.8 hospitalizations/100,000 population to 0 hospitalizations) in infants < 12 months and 1 to < 2 y of age 12 months after program implementation. No apparent reduction occurred in the site with vaccine coverage of < 40%, or in the non-intervention control site. No cases of intussusception were associated with vaccine receipt, and no increase in all-cause diarrhea was observed. A universal infant rotavirus vaccine program with high coverage was associated with reductions in rotavirus and no safety signals; no reduction was observed in settings with low vaccine coverage.
