How well flu, COVID-19, and other respiratory vaccines prevent outpatient illness

RFA-IP-22-004, US Platform to Measure Effectiveness of Seasonal Influenza, COVID-19 and other Respiratory Virus Vaccines for the Prevention of Acute Illness in Ambulatory Settings

NIH-funded research Duke University · NIH-11141538

This project compares how well seasonal flu, COVID-19, and other respiratory vaccines keep people from getting sick enough to need outpatient care in community and household settings.

Quick facts

Grant typeU01 cooperative agreement
Study typeNIH-funded research
Funding institutionDuke University NIH-funded
Lab location1 site (Durham, United States)
Project IDNIH-11141538 on NIH RePORTER

What this research studies

This project follows people who visit outpatient clinics or live in households to track respiratory illnesses like influenza and COVID-19. Participating sites across the U.S. will use common protocols and standard procedures coordinated by Duke to collect information on symptoms, vaccination status, and lab test results. The network links clinic visit data, lab-confirmed infections, and vaccine records to measure how often vaccinated and unvaccinated people get symptomatic illness. Centralized data management and analysis will let researchers compare vaccine protection across seasons and different respiratory viruses.

Who could benefit from this research

Good fit: Ideal participants are people who seek outpatient care for cough, fever, or other respiratory symptoms and household members enrolled in community surveillance, including both vaccinated and unvaccinated individuals.

Not a fit: People who are hospitalized with severe disease, who do not seek outpatient care, or who live outside participating U.S. sites are unlikely to participate or gain direct benefit from this project.

Why it matters

Potential benefit: If successful, the project could help doctors and public health officials choose vaccines and strategies that better prevent outpatient respiratory illness and improve vaccination recommendations.

How similar studies have performed: Previous CDC and research-network efforts have successfully used outpatient and household surveillance to measure influenza and COVID-19 vaccine effectiveness, and this project builds on those established methods.

Where this research is happening

Durham, United States

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.