Loss of Smell from COVID-19: What We Know
Impact on the Brain and Behavior
A study of 73 COVID-19 survivors found that those who lost their sense of smell showed changes in brain function and behavior.
Behavioral Changes:
- Increased anxiety
- Depression
- Reduced social interaction
Long-Term Effects
A study in Nature by Douaud and colleagues suggests that SARS-CoV-2 infection can have long-term effects on brain function.
Researchers found that those who had COVID-19 experienced changes in brain areas responsible for smell, memory, and attention even months after recovery.
Prevalence of Smell Loss
Studies indicate that a significant number of COVID-19 patients experience smell loss:
- Up to 68% lose their sense of smell
- 44% lose their sense of taste
Understanding the Mechanism
Researchers are still investigating how SARS-CoV-2 causes loss of smell.
One theory suggests that the virus infects and damages cells in the olfactory system, which is responsible for our sense of smell.
Conclusion
Loss of smell is a common symptom of COVID-19 that can have significant behavioral and neurological implications.
While the exact mechanisms are still being studied, research suggests that SARS-CoV-2 infection can have long-term effects on the brain.
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