Inclusion Criteria:  Adult (18-65 years). Mild infection by SARS-CoV-2 detected by PCR or Antigen. Onset of COVID-19 symptoms up to 5 days before the day of inclusion Without hospitalization or oxygen supplementation on the day of inclusion. Signed written informed consent  Exclusion Criteria:  Serious SARS-CoV-2 infection requiring hospitalization or oxygen supply Chronic diseases under regular medication (eg asthma, allergic rhinitis ...) Congenital or acquired immunodeficiency Body Mass Index (BMI)> 30 Coagulation disorders Short bowel syndrome or any surgery on the gastrointestinal tract. Metabolic disorders (diabetes, etc.). Heart failure and cardiac medical history Pregnant women. HIV positive. Immunocompromised History of significant gastrointestinal diseases Use of other probiotics during the last month. Uncertainty about the willingness or ability of the participant to comply with the requirements of the protocol.