Measles Vaccination in Infants at 4.5 Months
Author Information
Author(s): Martins Cesário L, Garly May-Lill, Balé Carlito, Rodrigues Amabelia, Ravn Henrik, Whittle Hilton C, Lisse Ida M, Aaby Peter
Primary Institution: Bandim Health Project, Guinea-Bissau
Hypothesis
Can early measles vaccination at 4.5 months provide effective protection against measles in infants?
Conclusion
Early vaccination with the Edmonston-Zagreb measles vaccine at 4.5 months significantly reduces the incidence of measles and prevents hospital admissions and mortality.
Supporting Evidence
- 28% of children had protective maternal antibodies at enrolment.
- 92% of vaccinated children had measles antibodies at 9 months.
- Vaccine efficacy against measles infection was 94%.
- 100% efficacy against hospital admissions for measles.
- 100% efficacy against measles mortality.
Takeaway
Giving measles vaccine to babies at 4.5 months can help protect them from getting sick before they are old enough for the usual vaccine at 9 months.
Methodology
Randomised clinical trial comparing early measles vaccination at 4.5 months with standard vaccination at 9 months.
Potential Biases
Possible bias in the diagnosis of measles due to lack of blinding regarding vaccination status.
Limitations
The study was an interim analysis and may not capture long-term effects; potential bias in diagnosing measles cases.
Participant Demographics
Infants aged 4.5 months, with a mix of boys and girls from urban Guinea-Bissau.
Statistical Information
P-Value
0.034
Confidence Interval
95% confidence interval 77% to 99%
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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