Procedures
DEL
A study physician contacted potential study participants by telephone to verify eligibility and obtain informed consent. Patients were then sent enrollment documentation, informed consent, and dispensing of the olive oil. High polyphenolic olive oil was left with participants for self‐administration on Days 1–90. Subsequently, patients were contacted by telephone by study staff on Days 15–30, 60, and 90 for a structured interview. Diagnosis of COVID‐19 in participants who were infected during the study was made by SARS‐CoV‐2 reverse transcriptase‐polymerase chain reaction performed at the laboratory of the Hospital Nuestra Señora del Prado, belonging to the National Health system. Nasophryngeal swabs were tested on the same day of collection from individuals by the Xpert Xpress SARS‐CoV‐2 test, a rapid real‐time RT‐PCR test intended for the qualitative detection of nucleic acid from the SARS‐CoV‐2 in upper respiratory specimens. A study physician reviewed medical records of patients to complete the information required by the protocol.