A peer-reviewed study from Germany suggests a cheap, decades-old nasal spray may help block COVID infection. Published in JAMA Internal Medicine, the phase 2 double-blind, placebo-controlled trial followed 450 healthy adults from 2023–2024. Researchers found azelastine, a common over-the-counter allergy spray, showed potential in preventing infection—raising questions about overlooked, low-cost alternatives during the pandemic.
New peer-reviewed study suggests a cheap over-the-counter nasal spray may help block COVID infection
