1. Volunteer health professionals, over 18 years of age and belonging to the first line of care for COVID-19 patients. 2. Health professionals belonging to the Dr. Enrique Cabrera Cosio Hospital. 3. Negative diagnosis for SARS-CoV-2 by PCR. 4. Sign informed consent in writing of the volunteer.

1. Volunteer health professionals, over 18 years of age and belonging to the first line of care for COVID-19 patients. 2. Health professionals belonging to the Dr. Enrique Cabrera Cosio Hospital. 3. Negative diagnosis for SARS-CoV-2 by PCR. 4. Sign informed consent in writing of the volunteer.