• Recent COVID-19 infection (<3 months), confirmed with a positive test • Persistent loss of smell after one month, objectified by TDI < 30.5 on Sniffin’ Stick test• Age 18 years or older, capable of giving informed consent

• Recent COVID-19 infection (<3 months), confirmed with a positive test • Persistent loss of smell after one month, objectified by TDI < 30.5 on Sniffin’ Stick test• Age 18 years or older, capable of giving informed consent