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Phase 1 study shows that nasal spray delivery of anti-flu antibodies is safe and effective however duration of action is only three hours before antibodies degrade.
Medical Mythbusting Commentary for February 6, 2026 Source:Breakthrough nasal spray found to protect against all forms of flu Reference:Phase 1 and preclinical studies reveal safety, pharmacokinetics, and efficacy of intranasal delivery of the influenza antibody CR9114