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toxin-antitoxin

noun

: a mixture of toxin and antitoxin used especially formerly in immunizing against a disease (as diphtheria) for which they are specific

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“Toxin-antitoxin.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/toxin-antitoxin. Accessed 2 Dec. 2025.

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