Oropharyngeal Immunoprophylaxis With High Polyphenolic Olive Oil as Clinical Spectrum Mitigating Factor in COVID-19.

High polyphenolic olive oil is normal olive oil obtained from early harvest olives, this early harvest olive oil has been widely used for culinary purposes for centuries. The investigators wanted to study if oromucosal immunoprophylaxis with small quantities of high polyphenolic olive oil (2 mL of olive oil equivalent to 5 mg of polyphenols) adiministered twice a day could have clinical mitigating effects on the disease caused by SARS-CoV-2 infection.The primary outcome was to determine the effect of high polyphenolic olive oil on Coronavirus disease incidence, duration and severity.