Novel Coronavirus (2019-nCoV) advice for the public: Myth busters
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Can gargling mouthwash protect you from infection with the new coronavirus?
No. There is no evidence that using mouthwash will protect you from infection with the new coronavirus.
Some brands or mouthwash can eliminate certain microbes for a few minutes in the saliva in your mouth. However, this does not mean they protect you from 2019-nCoV infection.