* anosmia and hyposmia pre-covid-19 * be known chronic rhinosinusitis with or without nasal polyposis * have received radiotherapy or chemotherapy for head and neck tumors * have a diagnosis of alzheimer's, parkinson's, multiple sclerosis or any other neurodegenerative disease 5. have a brain tumor or ent diagnosis 6. history of naso-sinus surgery; 7. history of traumatic brain injury

* anosmia and hyposmia pre-covid-19 * be known chronic rhinosinusitis with or without nasal polyposis * have received radiotherapy or chemotherapy for head and neck tumors * have a diagnosis of alzheimer's, parkinson's, multiple sclerosis or any other neurodegenerative disease 5. have a brain tumor or ent diagnosis 6. history of naso-sinus surgery; 7. history of traumatic brain injury

anosmia and hyposmia pre-covid-19 be known chronic rhinosinusitis with or without nasal polyposis have received radiotherapy or chemotherapy for head and neck tumors have a diagnosis of alzheimer's, parkinson's, multiple sclerosis or any other neurodegenerative disease 5. have a brain tumor or ent diagnosis 6. history of naso-sinus surgery; 7. history of traumatic brain injury

anosmia and hyposmia pre-covid-19 be known chronic rhinosinusitis with or without nasal polyposis have received radiotherapy or chemotherapy for head and neck tumors have a diagnosis of alzheimer's, parkinson's, multiple sclerosis or any other neurodegenerative disease 5. have a brain tumor or ent diagnosis 6. history of naso-sinus surgery; 7. history of traumatic brain injury