Clinical trial of mRNA universal influenza vaccine begins

May 16, 2023
Trial will enroll up to 50 healthy volunteers aged 18 through 49.

A clinical trial of an experimental universal influenza vaccine developed by researchers at the National Institute of Allergy and Infectious Diseases’ (NIAID) Vaccine Research Center (VRC), part of the National Institutes of Health, has begun enrolling volunteers at Duke University in Durham, North Carolina. This Phase 1 trial will test the experimental vaccine, known as H1ssF-3928 mRNA-LNP, for safety and its ability to induce an immune response.

The trial will enroll up to 50 healthy volunteers aged 18 through 49. Three groups of study participants (10 participants each) will be vaccinated with 10, 25, and 50 micrograms of the experimental vaccine, respectively. After evaluation of the data to determine an optimum dosage, an additional 10 participants will be enrolled to receive the optimum dosage. The study also will include a group of participants who will receive a current quadrivalent seasonal influenza vaccine. This will allow the researchers a point of direct comparison between the immunogenicity and safety of the candidate vaccine and available seasonal flu vaccines. Participants will be regularly evaluated to assess the vaccine’s safety (and, secondarily, its efficacy) and will receive follow-up appointments for up to one year after vaccination.

NIH release