I heard that mouthwash kills the coronavirus! How often should I gargle?

Uncertainty and Misinformation

A. TL,DR: Mouthwash won’t prevent or cure COVID-19. Consistent with several prior studies, a recent laboratory-based study out of Cardiff University found that over-the-counter mouthwash (with active ingredient cetylpyridinium chloride [CPC]) will inactivate 90-99% of the coronavirus after a mere 30 seconds. Sounds exciting! …but don’t get your hopes up. The clinical relevance of mouthwash