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![DNA and other molecules painted on an ancient wall DNA and other molecules painted on an ancient wall](https://public4.pagefreezer.com:443/content/National%20Institutes%20of%20Health/21-07-2024T17:04/https://www.nih.gov/sites/default/files/news-events/research-matters/2022/20221122-dna.jpg)
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DNA and other molecules painted on an ancient wall
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The study suggests that viral DNA left over from ancient infections may still play a role protecting us from modern viruses.
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SergioSH / Shutterstock
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DNA and other molecules painted on an ancient wall
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DNA and other molecules painted on an ancient wall