Killed Vaccine

Killed Vaccine, also known as an inactivated vaccine, refers to a vaccine produced using pathogens that have been rendered non-infectious through chemical or physical methods while retaining antigenic structures capable of eliciting immune responses. Inactivated vaccines cannot replicate in the host, offering improved safety compared to live attenuated vaccines, though they may require adjuvants or multiple doses to achieve durable immunity.

The vaccine industry produces killed vaccines for several infectious diseases, employing validated inactivation processes ensuring complete loss of infectivity while maintaining antigen integrity. Manufacturing requires stringent control of inactivation parameters alongside robust testing confirming safety and antigen preservation. Formulation often includes adjuvants enhancing immune responses and stabilisers supporting storage stability. Regulatory submissions require demonstrating consistent inactivation, immunogenicity, and protective efficacy across manufacturing batches. While newer platforms such as mRNA and viral vectors expand vaccine development options, killed vaccines remain important due to established safety profiles and suitability for certain populations including immunocompromised individuals.