First-in-Human Clinical Trial of a Mosaic Quadrivalent Influenza Vaccine Compared With a Licensed Inactivated Seasonal QIV in Healthy Adults

Adjuplex is a sterile, pyrogen-free adjuvant solution produced by the VRC Pilot Plant. Adjuplex comprises highly purified de-oiled soy lecithin and benzene-free carbomer homopolymer formulated in phosphate buffered saline. Adjuplex adjuvant was mixed with FluMos-v1 at 20% by volume in the pharmacy during product preparation for the vaccinations of Groups 5A-5B.

Flucelvax is an inactivated influenza vaccine licensed for the 2020-2021 season.

FluMos-v1 investigational vaccine is composed of engineered pentameric promoters based on C. albicans lumazine synthase assembled with 20 trimeric promoters displaying HA ectodomains. It contains hemagglutinin (HA) proteins from the following 4 influenza strains: A/Idaho/07/2018, A/Perth/1008/2019, B/Colorado/06/2017 and B/Phuket/3073/2013.