The Egyptian fish that shows us why having a fever is very useful
Briefly

The research demonstrates that Nile tilapia actively seek warmer waters when infected, triggering physiological changes that enhance their immune response, similar to mammalian fever.
Fever, as a defense mechanism, predates warm-blooded animals, indicating a deep evolutionary root in cold-blooded species like tilapia, which use heat to bolster immunity.
Read at english.elpais.com
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