Rubella susceptibility predicts measles susceptibility: implications for postpartum immunization.

Area of Science:

• Obstetrics and Gynecology
• Immunology
• Infectious Diseases

Background:

• Immunity to vaccine-preventable diseases during pregnancy is crucial for maternal and infant health.
• Rubella immunity status is often assessed, but co-existing measles and mumps immunity is less frequently evaluated.
• Understanding serostatus for these viral infections is vital for public health strategies.

Purpose of the Study:

• To determine the prevalence of measles and mumps antibody titers in pregnant women.
• To assess the correlation between rubella immunity and susceptibility to measles and mumps.
• To identify potential risks for pregnant women regarding these viral infections.

Main Methods:

• Antibody titers for measles, mumps, and rubella were measured in 262 pregnant women.
• Participants were categorized based on their rubella antibody status (positive or negative).
• Serological testing was used to determine susceptibility to measles and mumps.

Main Results:

• Overall susceptibility to measles was 4.6% and to mumps was 7.6%.
• Measles susceptibility was significantly higher in rubella-susceptible women (8.2%) compared to rubella-immune women (0.8%).
• Mumps susceptibility was similar between rubella-susceptible (7.8%) and rubella-immune (7.4%) groups.

Conclusions:

• A notable proportion of pregnant women exhibit susceptibility to measles, particularly those who are also susceptible to rubella.
• While mumps susceptibility was evenly distributed, measles immunity appears linked to rubella immunity status.
• These findings highlight the importance of assessing immunity to multiple viral infections in pregnant populations.