[Moderna's skin cancer shot](https://www.marketwatch.com/story/modernas-personalized-mrna-shot-could-reshape-the-fight-against-skin-cancer-but-it-may-also-be-overhyped-a6f1bc88?mod=mw_rss_topstories) is getting the usual tailwind—doctors excited, patients hopeful, headlines screaming breakthrough. But the real question isn't whether the science works. It's whether Moderna can manufacture personalized treatments fast enough and cheap enough to actually scale.

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