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Related Concept Videos

Vaccinations01:51

Vaccinations

Overview
Vaccines01:21

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...
Vaccine Production01:23

Vaccine Production

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...
Cancer Vaccines01:30

Cancer Vaccines

Cancer treatment vaccines are a rapidly evolving field that offers a promising approach to immunotherapy. Unlike traditional vaccines that prevent diseases, cancer treatment vaccines are designed to treat existing cancers by stimulating the immune system to recognize and attack cancer cells.
Cancer vaccines come in two categories: preventive (prophylactic) and treatment (active). Preventive vaccines, such as the Human Papillomavirus (HPV) vaccine, protect against viruses that cause certain...
Microorganisms in Medicine and Therapeutics01:29

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.
Development of Immunocompetence01:22

Development of Immunocompetence

The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
The initial cells that migrate from the fetal thymus settle within the skin and epithelial tissues lining the mouth, digestive tract, and in females, the uterus and vagina. These cells, including skin-based dendritic cells, serve as antigen-presenting cells, playing a key role in T cell activation.
Subsequent T...

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Combination Vaccines in Routine Childhood Immunization Programs - Worldwide, 2024.

Fan Zheng1,2, Guzainuer Abudurusuli1, Linlin Gong1,2

  • 1State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, School of Public Health, Xiamen University, Xiamen City, Fujian Province, China.

China CDC Weekly
|May 22, 2026
PubMed
Summary
This summary is machine-generated.

Combination vaccines streamline childhood immunizations, reducing visits and injections. Global use varies, with low-income nations facing access gaps for advanced formulations like hexavalent vaccines.

Keywords:
Combination VaccineImmunization ProgramRoutine Immunization

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Area of Science:

  • Public Health
  • Vaccinology
  • Global Health

Background:

  • Combination vaccines improve health system efficiency and caregiver compliance.
  • Routine childhood immunization requires multiple clinic visits and injections.

Purpose of the Study:

  • To review the global landscape of combination vaccines in 2024.
  • To identify disparities in access to advanced combination vaccine formulations.
  • To propose strategies for integrating combination vaccines into primary healthcare.

Main Methods:

  • Review of currently available combination vaccines worldwide.
  • Analysis of global usage patterns and coverage gaps.
  • Examination of factors contributing to access disparities.

Main Results:

  • Eight types of combination vaccines are available globally, categorized by DTP-containing and measles-containing formulations.
  • Pentavalent DTP-containing and MMR vaccines are most common, but 15 countries lack measles-containing combination vaccines.
  • Significant coverage gaps and service drop-offs exist in low-income countries, linked to economic disparities and access to advanced vaccines like hexavalent formulations.

Conclusions:

  • Tailored strategies are needed to integrate combination vaccines with primary healthcare.
  • Strengthened primary healthcare delivery and sustainable financing are crucial.
  • Improved service continuity and reduced dropout rates are essential for underperforming regions to align with Immunization Agenda 2030.