Ohio State University May 8 2025 Scientists have engineered a monoclonal antibody that can protect mice from a lethal dose of influenza A, a new study shows. The new molecule combines the specificity of a mature flu fighter with the broad binding capacity of a more general immune system defender. The protective effect was enhanced by delivering the antibody in a nasal spray that disperses these molecules throughout the respiratory tract, where they stick to the slippery mucus lining to lie in