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The preliminary findings, which are yet to be peer reviewed, come ahead of a clinical trial investigating whether over-the-counter mouthwash can reduce the levels of coronavirus in a patient's saliva. The Cardiff University report said that mouthwashes containing at least 0.07 per cent cetypyridinium chloride (CPC) showed “promising signs” of being able to combat the virus. “Although this in-vitro study is very encouraging and is a positive step, more clinical research is now clearly needed,” Dr Thomas told the PA news agency, as quoted by the Independent newspaper. “We need to understand if the effect of over-the-counter mouthwashes on the COVID-19 virus achieved in the laboratory can be reproduced in patients, and we look forward to completing our clinical trial in early 2021.” Dr Nick Claydon, a specialist periodontologist, said he believed mouthwash can become an important addition to fighting coronavirus along with “handwashing, physical distancing and wearing masks, both now and in the future”. #HerefordVoice