News Moderna launches Phase 3 trial of mRNA bird flu vaccine in UK and US to protect high-risk groups by Dr Natalie Singh - Health Editor April 22, 2026 by Dr Natalie Singh - Health Editor April 22, 2026 Moderna has begun a Phase 3 trial of its mRNA-based bird flu vaccine in the UK and US, enrolling approximately 4,000 participants to test protection against the A(H5N1) strain. The … 0 FacebookTwitterPinterestEmail