Antenatal rubella immunity in Ireland

Area of Science:

• Public Health
• Immunology
• Obstetrics

Background:

• Congenital Rubella Syndrome (CRS) poses a significant risk to newborns.
• Pre-pregnancy rubella vaccination is crucial for preventing CRS.
• Identifying women who would benefit from vaccination is essential for public health initiatives.

Purpose of the Study:

• To identify women attending antenatal care in Ireland who would benefit from pre-pregnancy rubella vaccination.
• To analyze risk factors associated with rubella non-immunity in pregnant women.

Main Methods:

• A population-based observational study utilizing data from the National Perinatal Reporting System in the Republic of Ireland (2009).
• Analysis of rubella immunity status, age, parity, and nationality of women delivering babies.
• Statistical comparison of rubella seronegativity rates across different demographic groups.

Main Results:

• Of 72,333 women with known rubella status, 6.4% were not immune.
• Rubella seronegativity was higher in younger women (<25 years: 14.7%) compared to older women (≥25 years: 5.0%).
• Nulliparous women (8.0%) and those born outside the EU (11.4%) showed significantly higher rates of rubella non-immunity.

Conclusions:

• Targeted pre-pregnancy rubella vaccination programs should focus on young, nulliparous women.
• Women born outside the European Union represent a key demographic for rubella screening and vaccination.
• These targeted strategies are vital for the prevention of Congenital Rubella Syndrome in Ireland.