Scientists Solve Key COVID Mystery: Why Do Patients Lose Ability To Smell?

 

‘Harvard neuroscientists took a close look at a specialized type of sensory neurons in the nose that detect and transmit smells to the brain.

“Our intuition, and I think the intuition of many other people, would be that the virus would attack these sensory neurons and damage or kill these neurons, and that’s how we lose our sense of smell,” said Datta, an associate professor of neurobiology in the Blavatnik Institute at Harvard Medical School. The study Datta led was published Friday in the journal Science Advances.

“But in looking at our data, we got a big surprise,” he said. “Which is that it seems like the virus is not actually capable of attacking the neurons that live in your nose.”

Instead, the scientists discovered that two other kinds of cells that support those neurons are being attacked. Those cells can regenerate more quickly.

“And so we think, on the whole, this is good news, and suggests that people who lose their sense of smell, for the most part, are going to go on to get their sense of smell back,” Datta said.

That’s what doctors have seen as the epidemic has progressed — most patients regain their sense of smell in several weeks….’

— via WGBH

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