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Highlights
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SARS-CoV-2 infection/vaccination correlate to the in vivo fate of CD34+ HSPCs.
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SARS-CoV-2 infection/vaccination correlate to hematopoiesis of CD34+ HSPCs.
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SARS-CoV-2 vaccination correlates with CD34+ HSPC numbers/frequencies in the UCB.
Summary
Graphical abstract
![Figure thumbnail fx1](https://www.cell.com/cms/attachment/721daa2b-06fb-4f51-99a5-43768d3a5416/fx1.jpg)