inclusion criteria: * confirmed (positive laboratory antigen test) or suspected covid-19 infection * sudden onset of smell loss * smell loss of at least 4 weeks * reduced smell function through psycho-physical testing (brief smell identification test score of 8 or less)

inclusion criteria: * confirmed (positive laboratory antigen test) or suspected covid-19 infection * sudden onset of smell loss * smell loss of at least 4 weeks * reduced smell function through psycho-physical testing (brief smell identification test score of 8 or less)

inclusion criteria: confirmed (positive laboratory antigen test) or suspected covid-19 infection sudden onset of smell loss smell loss of at least 4 weeks reduced smell function through psycho-physical testing (brief smell identification test score of 8 or less)

inclusion criteria: confirmed (positive laboratory antigen test) or suspected covid-19 infection sudden onset of smell loss smell loss of at least 4 weeks reduced smell function through psycho-physical testing (brief smell identification test score of 8 or less)