- People with certain underlying diseases (such as asthma and history of allergies, Parkinson's, Alzheimer's, severe eating disorders, acute rhinitis, acute sinusitis, nasal congestion, for example, after rhinoplasty, traumatic nerve damage and. Having other viral and bacterial infections at the same time as Covid-19 - People who deal with thick odors in their job, such as working with paint or acid.

- People with certain underlying diseases (such as asthma and history of allergies, Parkinson's, Alzheimer's, severe eating disorders, acute rhinitis, acute sinusitis, nasal congestion, for example, after rhinoplasty, traumatic nerve damage and. Having other viral and bacterial infections at the same time as Covid-19 - People who deal with thick odors in their job, such as working with paint or acid.