The cells responsible for our sense of smell are found high up in the nose and are called olfactory sensory neurons. When we smell something, it is through the process of cells in our nasal passageways and brain working together. To understand this, we need to first look at how smell works. So how does COVID-19 affect people’s sense of smell? Less than five percent of smell disorders resulting from COVID can last beyond six months. ![]() Phantosmia: a rarer complaint where one constantly smells something nobody else is able to smell.įor most, smell returns to normal within two to four weeks after loss, but for some, it can take longer. Hyposmia: a reduced ability to detect odours. Parosmia: a change in the normal perception of odours, such as when the smell of something familiar is distorted, or when something that normally smells pleasant now smells foul, like faeces or sewage, for example. ![]() The exact percentage of people who experience a loss or change in their sense of smell after contracting COVID-19 is difficult to estimate as it relies on affected people self-reporting, but one analysis suggests it could be just more than 50 percent.ĬOVID-19 is known to cause a number of smell disorders:Īnosmia: the complete inability to detect odours. The loss or change in one’s sense of smell and taste has proven to be a more accurate indicator of a COVID-19 infection than even a fever and cough.
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