28 May, 2020
8 Min Read
Why do some Covid-19 patients lose their sense of smell?
Loss of the sense of smell (and taste), one of the more recently identified symptoms of Covid-19, is now recognised as such by the World Health Organization (WHO) and the health authorities of some countries, including the US.
Tracking the proteins
SARS-CoV-2, the virus that causes Covid-19, hijacks two human proteins to invade cells.
Age is a factor
Why the nose matters
There are two kinds of cells in the nose as the likely first entry points for the virus. These are :
That study, too, had drawn its conclusions from the expression of the two entry proteins. Using the Human Cell Atlas database, it looked at data from different tissues of non-infected people. It found that these two proteins had the highest presence in goblet and ciliated cells.
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