What do we mean by "COVID-19 changes your brain"?

The results, published March 7 in Nature, prompted headlines about COVID-19 causing brain damage and shrinkage. That coverage, in turn, prompted alarmed posts on social media, including mentions of early-onset dementia and brain rotting.

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As someone who has reported on brain research for more than a decade, I can say those alarming words are not the ones that I would choose here…

I can rattle off a long, long list of things that change the brain, such as learning new things, sleeping and using a smartphone (SN: 9/5/17; SN: 6/5/14; SN 3/17/17). Learning the streets of London, juggling and meditating may all change the structure of the brain. Essentially, the events of our lives are reflected in the size, shape and behavior of our constantly changing brains.

Growing up is one of those events that changed your brain. As a toddler, you had the most nerve cell connections in some parts of your brain that you’ll ever have in your life.

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