Memory problems after covid-19 more common in people with smell loss

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Memory problems after covid-19 more common in people with smell loss
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Regardless of how severe their other symptoms were, people who still have smell loss more than three months after covid-19 infection are more likely to have cognitive problems than those who regained or never lost their sense of smell

To see if loss of smell due to covid-19 is associated with persistent cognitive symptoms,at the Pontifical Catholic University of Argentina in Buenos Aires and her colleagues analysed data from 766 adults aged 60 years or older who had no history of cognitive impairment. Each had taken a PCR test at a covid-19 testing clinic in Argentina, and nearly 90 per cent tested positive.

They found that two-thirds of the people who tested positive for covid-19 had some form of memory impairment, and for half of this group, it was severe enough to interfere with their daily lives. What’s more, the people who still had complete loss of smell three months post-infection were roughly 1.5 times more likely to have lasting cognitive impairments compared with those who never lost or had already regained their sense of smell. This was the case regardless of the severity of their infection or whether they had required hospitalisation, says Gonzalez-Alemán.Frederic Meunier

at the University of Queensland in Australia. “Scientists could waste a lot of time looking at other possibilities for how the virus enters the brain, but it seems there is something here that is worth pursuing.” Given that most brain cells lack the ACE2 receptor the virus normally uses to break into cells, it is unclear whether cognitive symptoms are due to

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