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Background
It was evidenced that cetylpyridinium‐chloride (CPC) mouthwash could inhibit SARS‐COV‐2 activity and reduce salivary viral load, thus reducing SARS‐CoV‐2 transmission. However, due to insufficient residence time in the oral cavity, CPC‐containing mouthwashes have no prolonged antiviral effect. The duration of action of the CPC buccal tablet is expected to be longer than that of the mouthwash...