1. Sanitary with high exposure to COVID-19 with training of doctor or DUE belonging to the health network of Navarra 2. No previous diagnosis of COVID-19 3. Not present symptoms compatible with COVID-19, neither present nor past 4. Negative Ig M or Ig G negative immunochromatography test result for both 5. You agree not to self-medicate with chloroquine, hydroxychloroquine, or other potential antivirals. 6. That they give their written informed consent to participate in the trial 7. Not being pregnant. To do this, if you suspect that you might be, you should have previously had a pregnancy test. 1. Sanitario con alta exposición a COVID-19 con formación de médico o DUE perteneciente a la red sanitaria de Navarra 2. No diagnóstico previo de COVID-19 3. No presentar síntomas compatibles con COVID-19 ni presentes ni pasados 4. Resultado de test rápido de inmunocromatografía de Ig M o Ig G negativo para ambos 5. Consiente no automedicarse con cloroquina , hidroxicloroquina ni otros potenciales antivirales. 6. Que otorguen su consentimiento informado por escrito para participar en el ensayo. 7. No estar embarazada, para ello si sospecha que pudiera estarlo deberá realizarse previamente un test de embarazo.

1. Sanitary with high exposure to COVID-19 with training of doctor or DUE belonging to the health network of Navarra 2. No previous diagnosis of COVID-19 3. Not present symptoms compatible with COVID-19, neither present nor past 4. Negative Ig M or Ig G negative immunochromatography test result for both 5. You agree not to self-medicate with chloroquine, hydroxychloroquine, or other potential antivirals. 6. That they give their written informed consent to participate in the trial 7. Not being pregnant. To do this, if you suspect that you might be, you should have previously had a pregnancy test. 1. Sanitario con alta exposición a COVID-19 con formación de médico o DUE perteneciente a la red sanitaria de Navarra 2. No diagnóstico previo de COVID-19 3. No presentar síntomas compatibles con COVID-19 ni presentes ni pasados 4. Resultado de test rápido de inmunocromatografía de Ig M o Ig G negativo para ambos 5. Consiente no automedicarse con cloroquina , hidroxicloroquina ni otros potenciales antivirales. 6. Que otorguen su consentimiento informado por escrito para participar en el ensayo. 7. No estar embarazada, para ello si sospecha que pudiera estarlo deberá realizarse previamente un test de embarazo.