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Vaccines

Vaccines

Vaccines are among the most effective tools in preventive medicine, designed to prepare the immune system to recognize and combat infectious agents. By introducing antigens—substances that the immune system identifies as foreign—vaccines stimulate an adaptive immune response that leads to immunological memory. This immunological memory enables the body to mount a faster and more effective response upon future exposures to the actual pathogen.Vaccines can be categorized based on the type of...

Vaccinations

Vaccinations

Microorganisms in Medicine and Therapeutics

Microorganisms in Medicine and Therapeutics

Microorganisms play a fundamental role in vaccine development, gene therapy, and therapeutic production. Their biological properties are harnessed to advance medicine and public health. Beyond immunization, microorganisms contribute to gut health, antibiotic synthesis, and genetic disease treatment.Live Attenuated and Inactivated VaccinesLive attenuated vaccines, such as the measles, mumps, and rubella (MMR) vaccine, utilize weakened forms of pathogens to closely resemble natural infections.

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Recombinant DNA

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Vaccine Production

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Vaccine production involves a sequence of upstream and downstream processes to generate a safe and effective immunological product. It begins with cultivating microorganisms, such as viruses or bacteria, to obtain antigenic material. For viral vaccines, mammalian host cells are grown in bioreactors and subsequently infected with the target virus. The virus replicates within the host cells, which are lysed to release viral particles. This lysate is then clarified through filtration or...

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Updated: Jun 28, 2026

Protocol for Recombinant RBD-based SARS Vaccines: Protein Preparation, Animal Vaccination and Neutralization Detection

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Published on: May 2, 2011

[Perspectives on recombinant live vaccines].

¹Department of Virology II, National Institute of Infectious Diseases.

Nihon Rinsho. Japanese Journal of Clinical Medicine

|October 23, 2008

Summary

New recombinant viral and bacterial vectors offer a promising alternative for vaccine development, enabling single-dose delivery and robust immune responses against infectious diseases.

Area of Science:

Biotechnology
Immunology
Microbiology

Context:

Traditional vaccines, while effective, can have undesirable side effects.
Genetic engineering advances have enabled the development of novel vaccine vectors.
Live attenuated mutants of viruses and bacteria are being explored as vaccine delivery systems.

Purpose:

To review recent developments in recombinant viral and bacterial vectors for vaccine applications.
To highlight the advantages of using live vectors for antigen delivery.

Summary:

Recombinant viral and bacterial vectors are engineered live attenuated mutants of pathogens.
These vectors facilitate antigen delivery for vaccine purposes.
They offer advantages such as single-dose administration via oral, intranasal, or inhalational routes.

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Impact:

Potential for enhanced systemic and mucosal immune responses.
Development of next-generation vaccines with improved delivery and efficacy.
Addressing concerns regarding traditional vaccine side effects through innovative approaches.