Understanding Evolutionary Dynamics of Influenza to Inform and Improve Vaccine Strain Selection (R01 Clinical Trial Not Allowed) | RFA AI 20 055

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The National Institutes of Health (NIH) offered this discretionary grant opportunity, RFA-AI-20-055, titled "Understanding Evolutionary Dynamics of Influenza to Inform and Improve Vaccine Strain Selection (R01 Clinical Trial Not Allowed)." It is an R01 research project grant in the health area (CFDA 93.855) focused on seasonal influenza and the persistent challenge of keeping vaccine strains aligned with what actually circulates each year. The core aim is to fund research that improves scientific understanding of how seasonal influenza viruses evolve over time, especially in ways that change their antigenic properties, so that the field can better anticipate which new variants are likely to emerge and spread and, as a result, make more accurate vaccine strain selection decisions.

The main purpose of the funding is to strengthen the evidence base behind influenza vaccine strain selection by advancing knowledge of influenza evolutionary dynamics. In practical terms, this means supporting studies that clarify how and why influenza viruses accumulate mutations, how those mutations affect antigenic drift, and what ecological, immunological, and population-level forces shape which variants become dominant. By improving the ability to predict emergence and trajectory of antigenic variants, the research supported under this FOA is intended to reduce mismatches between vaccine strains and circulating strains, which can translate into better vaccine effectiveness across influenza seasons.

This FOA uses the R01 mechanism and explicitly states "Clinical Trial Not Allowed," signaling that the proposed work should be basic, computational, analytical, or preclinical in nature rather than interventional studies in humans where participants are prospectively assigned to receive an intervention. Applicants could still potentially use human-derived data or specimens, surveillance datasets, sequence repositories, serology panels, or observational/retrospective analyses, as long as the proposed project does not meet the NIH definition of a clinical trial. The emphasis is on research that builds predictive capacity and improves strain-selection decisions rather than testing interventions in a trial framework.

Eligibility is broad and includes many common applicant types: state, county, and local governments; special district governments; independent school districts; public and state-controlled institutions of higher education; private institutions of higher education; federally recognized Native American tribal governments; tribal organizations that are not federally recognized; public housing authorities/Indian housing authorities; nonprofits with or without 501(c)(3) status (outside of higher education); for-profit organizations other than small businesses; and small businesses. The announcement also highlights additional eligible applicant categories, including Alaska Native and Native Hawaiian Serving Institutions, Asian American Native American Pacific Islander Serving Institutions (AANAPISISs), Hispanic-serving institutions, Historically Black Colleges and Universities (HBCUs), Tribally Controlled Colleges and Universities (TCCUs), faith-based or community-based organizations, eligible federal agencies, U.S. territories or possessions, regional organizations, and non-U.S. entities (foreign organizations). This broad eligibility suggests NIH intended to encourage participation across diverse institutional types and geographies, including international partners, which is relevant given the global nature of influenza evolution and spread.

Key administrative details included an original closing date of February 11, 2021, and an award ceiling of $500,000. The listing indicates the opportunity was created on September 24, 2020. While the number of expected awards is not specified in the provided text, the ceiling gives a sense of the anticipated maximum annual budget level per award (as typically presented in FOA summaries), and applicants would generally be expected to propose a scope of work consistent with that cap.

Overall, the opportunity is best understood as NIH support for influenza evolution research tightly connected to public-health decision-making, with the specific downstream objective of improving seasonal vaccine strain selection. Projects responsive to this FOA would likely center on mechanisms and models of antigenic drift, evolutionary forecasting, integration of genetic and antigenic data, and approaches that turn surveillance and laboratory findings into better predictions about which strains are most likely to predominate in upcoming seasons, all while staying clearly outside the bounds of a clinical trial.

• The National Institutes of Health in the health sector is offering a public funding opportunity titled "Understanding Evolutionary Dynamics of Influenza to Inform and Improve Vaccine Strain Selection (R01 Clinical Trial Not Allowed)" and is now available to receive applicants.
• Interested and eligible applicants and submit their applications by referencing the CFDA number(s): 93.855.
• This funding opportunity was created on 2020-09-24.
• Applicants must submit their applications by 2021-02-11. (Agency may still review applications by suitable applicants for the remaining/unused allocated funding in 2026.)
• Each selected applicant is eligible to receive up to $500,000.00 in funding.
• Eligible applicants include: State governments, County governments, City or township governments, Special district governments, Independent school districts, Public and State controlled institutions of higher education, Native American tribal governments (Federally recognized), Public housing authorities/Indian housing authorities, Native American tribal organizations (other than Federally recognized tribal governments), Nonprofits having a 501 (c) (3) status with the IRS, other than institutions of higher education, Nonprofits that do not have a 501 (c) (3) status with the IRS, other than institutions of higher education, Private institutions of higher education, For-profit organizations other than small businesses, Small businesses, Others.

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