Clemens 2022 found that inclusion of TLR7/8 adjuvant R848 in an inactivated IAV vaccine can promote a lasting IgG response to the HA stem.
US CDC is conducting studies in Peru to assess if enhanced vaccines can overcome low antibody responses, randomizing adjuvanted vs standard egg-based influenza vaccine.
Seqirus is sponsoring a Phase 2 trial to evaluate responses to vaccination with different MF59 adjuvanted pandemic influenza vaccine formulations of an H5N1 vaccine in pediatric subjects (NCT04669691).