![Ongoing work at the Advanced Photon Source on SARS-CoV-2 variants of concern could lead to stronger vaccines and more effective treatments. (Image by Viacheslav Lopatin/Shutterstock.)](https://sandbox4-www.anl.gov/sites/www/files/styles/article_teaser_16x9/public/2021-11/CPA_RESIZE_covid%20variant%20story%20imageimage_16x9-1854498166.jpg?h=8abcec71&itok=zh02y-kH)
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