* subjects considered as a resolved case of covid-19 infection, according to guidelines from the colombian national institute of health. * health personnel with social distancing due to close contact without personal protective equipment with patients confirmed to be infected or taking any medication as a possible prophylaxis for covid-19 (example: chloroquine, hydroxychloroquine, azithromycin) * health workers who have permits or temporary withdrawal from their hospital work for more than one week during the month of the study. * some type of allergy to chlorinated agents or hypersensitivity to hclo * known diagnosis of upper airway respiratory disease where covid-19 such as the common cold, sinusitis, pharyngitis, laryngotracheitis and epiglottitis or lower such as bronchiolitis, pneumonia, and mixed conditions have been ruled out. * previous covid19 infection determined by positive pcr or positive serum antibody titers. * any condition that in the principal investigator's discretion renders the subject ineligible to participate in the study.

* subjects considered as a resolved case of covid-19 infection, according to guidelines from the colombian national institute of health. * health personnel with social distancing due to close contact without personal protective equipment with patients confirmed to be infected or taking any medication as a possible prophylaxis for covid-19 (example: chloroquine, hydroxychloroquine, azithromycin) * health workers who have permits or temporary withdrawal from their hospital work for more than one week during the month of the study. * some type of allergy to chlorinated agents or hypersensitivity to hclo * known diagnosis of upper airway respiratory disease where covid-19 such as the common cold, sinusitis, pharyngitis, laryngotracheitis and epiglottitis or lower such as bronchiolitis, pneumonia, and mixed conditions have been ruled out. * previous covid19 infection determined by positive pcr or positive serum antibody titers. * any condition that in the principal investigator's discretion renders the subject ineligible to participate in the study.

- subjects considered as a resolved case of covid-19 infection, according to guidelines from the colombian national institute of health. - health personnel with social distancing due to close contact without personal protective equipment with patients confirmed to be infected or taking any medication as a possible prophylaxis for covid-19 (example: chloroquine, hydroxychloroquine, azithromycin) - health workers who have permits or temporary withdrawal from their hospital work for more than one week during the month of the study. - some type of allergy to chlorinated agents or hypersensitivity to hclo - known diagnosis of upper airway respiratory disease where covid-19 such as the common cold, sinusitis, pharyngitis, laryngotracheitis and epiglottitis or lower such as bronchiolitis, pneumonia, and mixed conditions have been ruled out. - previous covid19 infection determined by positive pcr or positive serum antibody titers. - any condition that in the principal investigator's discretion renders the subject ineligible to participate in the study.

- subjects considered as a resolved case of covid-19 infection, according to guidelines from the colombian national institute of health. - health personnel with social distancing due to close contact without personal protective equipment with patients confirmed to be infected or taking any medication as a possible prophylaxis for covid-19 (example: chloroquine, hydroxychloroquine, azithromycin) - health workers who have permits or temporary withdrawal from their hospital work for more than one week during the month of the study. - some type of allergy to chlorinated agents or hypersensitivity to hclo - known diagnosis of upper airway respiratory disease where covid-19 such as the common cold, sinusitis, pharyngitis, laryngotracheitis and epiglottitis or lower such as bronchiolitis, pneumonia, and mixed conditions have been ruled out. - previous covid19 infection determined by positive pcr or positive serum antibody titers. - any condition that in the principal investigator's discretion renders the subject ineligible to participate in the study.