Definition of "inactivated" [inactivated]

• Simple past tense and past participle of inactivate. (verb)

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• "Several vaccines are made by taking toxins and inactivating them with a chemical (the toxin, once inactivated, is called a toxoid)."
• "There is an alternative called inactivated polio vaccine or IPV, but unlike OPV it's expensive to make and difficult to deliver because it has to be injected by trained health workers in clinics."
• "Because the vaccine virus is "inactivated," it does not cause respiratory symptoms, such as congestion and cough, which are common with influenza infections."