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Thymosin alpha-1 is studied for effects on immune function.

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Whether an immune signal changes is a different question from whether patients survive serious illness.

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The TESTS trial enrolled more than eleven hundred adults with sepsis across Chinese centres.

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Participants received thymosin alpha-1 or placebo alongside standard care.

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The analysis did not demonstrate a reduction in deaths within twenty-eight days.

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A published correction updated some calculations without turning this into a positive mortality finding.

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That result applies to this trial and setting.

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It neither proves all possible uses ineffective nor establishes a general immune-boosting benefit in

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healthy people.