When we talk about Covid-19, we think especially of the respiratory problems it causes, and the cells of the pulmonary system that it infects. But more and more researchers are highlighting the effects of the coronavirus that may well not be secondary and constitute infections in their own right, with long-term consequences that appear worrying.
We are not surprised to know that it infects the nose. After all, it is also part of the respiratory tract. From the onset of the epidemic, doctors were flagging loss of smell as one of the common symptoms of the disease, but it remained to be seen why. Katarzyna Bilinska, from the University of Bydgoszcz (Poland) and her colleagues have found a lead by studying the infection process in mice: cells in the nasal cavity, which help detect odors, would contain two proteins that promote infection with SARS-CoV-2 (the Covid-19 virus), including the famous ACE2 receptor which is the main “gateway” of the virus into our cells.
If there is a change in smell, taste problems, lost or altered have also been noted in many patients. According to the team of Muhammad Aziz, from the University of Toledo (Spain), almost half of the people who contracted Covid-19 have experienced a change in their perception of taste. A fact deduced from a collection of studies on patients infected between mid-January and the end of March 2020.
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