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When you think of germ theory, you probably think of Louis Pasteur, Robert Koch, or Joseph Lister. But some mainstream sources now list Florence Nightingale as one of its “key 19th-century figures.” In this video, we dig into Nightingale’s own writings to see what she really believed — and why her focus on hygiene and environment doesn’t prove germ theory or validate Koch’s postulates. Nightingale lived alongside Pasteur and Koch, but she left a clear record of her stance — one that challenges the rewritten history we’re being fed today.
