Harvard Medical School researchers investigated the 'devastating' symptom — and say it's 'good news' because the loss of smell doesn't appear to be permanent. They found sensory neurons, those that detect smell and send it to the brain, are not vulnerable to Covid-19. But the experts say it means sensory neurons do not need to be 'built from scratch' — which could take months or never happen at all. Neither gene was expressed by olfactory sensory neurons, which detect and transmit information about smells to the brain. This structure in the forebrain receives signals from olfactory sensory neurons and is responsible for initial processing of a new smell.

Source: Daily Mail July 28, 2020 10:10 UTC