The objective of the clinical trial is to determine the short-term efficacy of cetylpyridinium chloride (CPC) mouthwashes to assess changes in the threshold cycle value of the analysis of the SARS-CoV-2 oropharyngeal saliva sample, in patients diagnosed with COVID-19 and with symptomatology compatible with the disease. A randomized double-blind pilot clinical trial (evaluator and patients) will be developed in patients with a diagnosis of COVID-19 and symptoms of the disease. The experimental group will perform a single rinse with a mouthwash containing Cetylpyridinium Chloride (CPC) while the placebo group will perform the same rinse, but with a harmless liquid that will act as a placebo. The study will be carried out in the Zaragoza III Health Sector, with patients belonging to the Zaragoza II Health Sector, collaborating with the "Seminario" health center and the Lozano Blesa Clinical University Hospital (HCULB). This project will be carried out in accordance with the CONSORT guidelines for clinical trials.
