Having informed consent to participate in the study - Have a positive PCR test They did not experience any signs of decreased olfactory and taste sensation at least 2 weeks before the onset of the first Covid-19 demonstrations. -Living in the city Non-smoker

Having informed consent to participate in the study - Have a positive PCR test They did not experience any signs of decreased olfactory and taste sensation at least 2 weeks before the onset of the first Covid-19 demonstrations. -Living in the city Non-smoker