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What Miniature Lab-Grown Brains Reveal About the Effects of Covid-19

Organoids are helping scientists study the coronavirus

Close up of purple gloved fingers holding up a small test tube of clear liquid of brain organoids.
A test tube containing brain organoids. Photo: Center for Alternatives to Animal Testing, Johns Hopkins University

The tiny blobs of brain tissue that Thomas Hartung grows in his lab at Johns Hopkins University aren’t much to look at. Just barely visible, they are little more than squishy white specks.

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Emily Mullin

Emily Mullin

Former staff writer at Medium, where I covered biotech, genetics, and Covid-19 for OneZero, Future Human, Elemental, and the Coronavirus Blog.