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    Implementing household serosurveys for measles and rubella in India revealed challenges in community engagement and data collection. These lessons learned are crucial for improving future population immunity assessments in low-resource settings.

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    Area of Science:

    • * Public Health
    • * Epidemiology
    • * Immunology

    Background:

    • * Serological surveillance offers direct measures of population immunity for vaccine-preventable diseases like measles and rubella.
    • * Household serosurveys provide high-quality, unbiased estimates of immunity but are logistically complex and costly.
    • * Understanding challenges in conducting these surveys is vital for accurate public health assessments.

    Purpose of the Study:

    • * To share lessons learned from implementing nine measles and rubella household serosurveys in India.
    • * To identify challenges faced during the surveys and their potential impact on results.
    • * To provide recommendations for facilitating future serosurvey implementation.

    Main Methods:

    • * Conducted nine representative household serosurveys focusing on measles and rubella.
    • * Surveys were implemented across five districts in India.
    • * Documented challenges in community mobilization, census data, nonresponse, and specimen handling.

    Main Results:

    • * Significant challenges were encountered in community mobilization and cooperation.
    • * Outdated census information limited survey enumeration and enrollment accuracy.
    • * Nonresponse due to refusal or unavailability, alongside data and specimen collection issues, impacted results.

    Conclusions:

    • * Lessons learned from Indian serosurveys are generalizable to similar surveys in low- and middle-income countries.
    • * Addressing challenges in community engagement and logistics is essential for successful serosurveys.
    • * Recommendations are provided to improve the conduct and reliability of future population immunity studies.