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Completed

NCT Number: NCT06824207

Repeated Cross Sectional Surveillance Study To Determine the Respiratory Syncytial Virus (RSV) Immunization Rates in German Infants

In June 2024, the German Standing Committee on Vaccination (STIKO) recommended the universal immunization of infants with nirsevimab during their first RSV season. Nirsevimab is a long-acting monoclonal antibody designed to provide passive immunity against RSV, significantly reducing the risk of severe RSV disease in infants. This recommendation marks the 2024/25 season as the first in which nirsevimab is broadly implemented for all infants in Germany.

Despite the introduction of this new prevention measure, there is currently no timely monitoring system for immunization rates. Understanding the uptake and coverage of nirsevimab is crucial for evaluating its impact on public health and guiding future vaccination strategies. Therefore, this study aims to monitor the national immunization rates of nirsevimab in children under one year of age during the initial seasons of its widespread use.

The primary objective of this study is to determine the Nirsevimab immunization rate in eligible infants in their first RSV-season in Germany. The study will focus on:

1. Assessing the immunization rates among eligible infants (according to STIKO recommendation) in their first RSV-season in Germany (i.e. across all geographies) 2. Assessing the immunisation rates among the "catch-up cohort", i.e. all infants born between April and September. For these infants, the STIKO recommends immunization with nirsevimab in early autumn. 3. Assessing the immunization rate among the "in-season cohort", i.e. all infants born during the RSV season between October and March. For these newborns, the STIKO recommends immunization with Nirsevimab shortly after birth, preferably during the second "well-baby visit" at the age of 3-10 days of life.

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Key information

Conditions

Respiratory Syncytial Virus Immunization

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Germany

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Be a parent of an infant born between April 2024/25/26 and March 2025/26/27, respectively
  • Reside in Germany at the time of survey completion
  • Be at least 18 years old at the time of survey completion.
  • Agree with privacy policy and AE (Adverse Event) reporting requirements before proceeding with the survey.
  • Read and agree to the ICF (Informed Consent Form) by ticking a box before proceeding with the survey.

Exclusion criteria

  • Participation in the study (= completed the survey) in a previous wave of the current season.

Note: The above information is not intended to contain all considerations relevant to a potential participation in a clinical trial.

Treatment and study plan

Primary outcomes

  1. Assessing the nirsevimab immunization rates among eligible infants in both cohorts

    Time frame: Throughout Study (Approximatley 4 months)

    Descriptive analysis of nirsevimab immunization status (yes/no) will be performed using summary statistics, i.e., proportion of immunized infants among all enrolled infants per wave.

Secondary outcomes

  1. Assessing the seasonal evolution of the nirsevimab immunization coverage rates among the two cohorts

    Time frame: Throughout Study (Approximatley 4 months)

    Descriptive analysis of nirsevimab immunization status over time will be performed using summary statistics, i.e., proportion of immunized infants among all enrolled infants per wave.

  2. Assessing reasons for/against nirsevimab immunization

    Time frame: Throughout Study (Approximately 4 months)

    The analysis for any potential influencing factors will be based on descriptive analytics and complemented with bi-variate analytics where applicable

  3. Assessing the nirsevimab immunization rates among subgroups

    Time frame: Throughout Study (Approximately 4 months)

    A descriptive analysis of immunization rates will be performed on subgroups such as: risk group (defined chronic condition or pre-term birth status), federal states and health insurance/Kassenärztliche Vereinigung, physician's association regions

  4. Assessing the reliability of a demographic study

    Time frame: Throughout the Study (Approximately 4 months)

    Assessing reliability based on randomly sampled parent population using Computer-Assisted Web Interview (CAWI)/ Computer-Assisted Telephone Interview (CATI)/ face-to-face interviews for estimating immunization rates in Germany

Sponsors and collaborators

Lead sponsor

Sanofi Pasteur, a Sanofi Company

Industry

Registry information

Official study title

Repeated Cross Sectional Surveillance Study To Determine the Respiratory Syncytial Virus (RSV) Immunization Rates in German Infants During Three RSV Seasons

Acronym: Vakzimeter RSV

Important dates

Study start
2025
Primary completion
2026
Study completion
2026
First posted
Feb 13, 2025
Registry last updated
Jun 22, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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