Another scientific investigation tested the viricidal properties of some oral rinses under conditions that mimicked the nasopharyngeal secretions. The report concluded that some of the formulations have significant SARS-CoV2 inactivating properties. This finding, according to them, might support the idea that oral rinses could reduce the viral load in saliva.
And finally, one report stated that two brands of mouthwash (Listerine and Chlorhexidine) “disrupted” the COVID-19 virus with little effect on the skin of the mouth that provides a barrier from the virus.
The idea that mouthwash can be used as protection against COVID-19 is promising, but experts remind the public that we still need more investigations and research. They explained there were limitations to the studies we currently have.
Some of these limitations include:
- The use of human coronaviruses. Case in point, the first study we discussed did not use the potentially deadly SARS-CoV2; the researchers used human coronaviruses, which can cause mild respiratory infections like the common cold.
- Checking only for the viricidal properties, which pertain to the ability of the oral rinses to inactivate the virus. Several reports didn’t check for the antiviral properties, which point to the ability to stop the proliferation.
- In vitro conditions. Many of the investigations took place under laboratory conditions, which is not the same with the oral environment. This is even though some researchers tried to mimic the nasopharyngeal secretions.