intolerance to bromhexine hydrochloride; work out of contact with sars-cov-2 infection; non-compliance with the rules for the use of personal protective equipment when working with sars-cov-2 infection (the rules for the use of personal protective equipment in accordance with the recommendations of the ministry of health of russia and the internal orders of the director general of almazov nmrc, relevant to the dates of research); pregnancy and the period of breastfeeding; other circumstances that the researcher considers inappropriate to participate in this study

intolerance to bromhexine hydrochloride; work out of contact with sars-cov-2 infection; non-compliance with the rules for the use of personal protective equipment when working with sars-cov-2 infection (the rules for the use of personal protective equipment in accordance with the recommendations of the ministry of health of russia and the internal orders of the director general of almazov nmrc, relevant to the dates of research); pregnancy and the period of breastfeeding; other circumstances that the researcher considers inappropriate to participate in this study

1. intolerance to bromhexine hydrochloride; 2. work out of contact with sars-cov-2 infection; 3. non-compliance with the rules for the use of personal protective equipment when working with sars-cov-2 infection (the rules for the use of personal protective equipment in accordance with the recommendations of the ministry of health of russia and the internal orders of the director general of almazov nmrc, relevant to the dates of research); 4. pregnancy and the period of breastfeeding; 5. other circumstances that the researcher considers inappropriate to participate in this study

1. intolerance to bromhexine hydrochloride; 2. work out of contact with sars-cov-2 infection; 3. non-compliance with the rules for the use of personal protective equipment when working with sars-cov-2 infection (the rules for the use of personal protective equipment in accordance with the recommendations of the ministry of health of russia and the internal orders of the director general of almazov nmrc, relevant to the dates of research); 4. pregnancy and the period of breastfeeding; 5. other circumstances that the researcher considers inappropriate to participate in this study