New Study Finds Mouthwash May Not Be Effective in Preventing COVID-19 Transmission
In a study conducted back in 2021, researchers explored the potential use of mouthwash as a method to reduce the risk of spreading and catching COVID-19. While the results were mixed, some evidence suggested that mouthwash could decrease the amount of virus in the mouth. This led to anecdotal reports of people using mouthwash as a preventative measure, particularly when traveling.
However, experts warn against relying solely on mouthwash to protect against COVID-19. Dr. Nicholas Rowan, the clinic director of otolaryngology at Johns Hopkins Medicine, explains that most studies on mouthwash’s efficacy have been conducted in controlled lab settings, making it difficult to determine real-world implications. While a substance may effectively kill the virus in a petri dish, its effectiveness in the human body and in preventing transmission is still uncertain.
Chana Davis, a geneticist and science communicator at Those Nerdy Girls, further emphasizes this point, stating that just because something works in a lab doesn’t mean it will translate into real-world effectiveness. While one trial did measure the decrease in viral levels in the mouths of COVID-19-infected individuals, the clinical implications of this reduction remain unclear. Davis highlights that reducing the virus load in the mouth does not guarantee protection as transmission primarily occurs through exhaled breath.
Furthermore, using mouthwash after potential exposure to the virus, such as sitting next to a coughing individual on an airplane, may not prevent inhalation of virus particles. Mouthwash is not a foolproof method of protection against COVID-19 transmission.
Instead, experts recommend relying on proven prevention strategies such as wearing masks, practicing hand hygiene, and maintaining social distancing. These strategies have been extensively studied and shown to be effective in reducing transmission. Nasal sprays, specifically those with a nitric acid base, have shown more promising evidence in reducing infection risk but require further research.
In conclusion, while using mouthwash may offer some benefits for oral health, it should not be solely relied upon for protection against COVID-19. It is crucial to prioritize evidence-based strategies that have proven effectiveness in preventing transmission and keeping oneself and others safe.