What is viral anosmia?
Viral anosmia is a total lack of olfaction caused by an upper respiratory infection (URI) virus destroying the cells of the olfactory epithelium through a process known as necrosis. The virus enters the cells and destroys them from within leading to a lack of smell. Usually only the olfactory receptor cells are destroyed but some doctors believe the olfactory nerve or the nasal serous glands can also be damaged .