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Vaccines and immunization - World Health Organization (WHO)
Vaccination is a simple, safe, and effective way of protecting people against harmful diseases, before they come into contact with them. It uses your body’s natural defences to build resistance to specific infections and makes your immune system stronger.
Vaccines and immunization: What is vaccination?
Receiving several vaccines or combination vaccines in one visit is important to protect children from various diseases as early as possible. This also makes it easier to complete the recommended doses on time. Combination vaccines (e.g. DTP for diphtheria, tetanus and pertussis) reduce the number of injections.
A Brief History of Vaccination
For centuries, humans have looked for ways to protect each other against deadly diseases. From experiments and taking chances to a global vaccine roll-out in the midst of an unprecedented pandemic, immunization has a long history.
COVID-19 vaccines - World Health Organization (WHO)
The COVID-19 global health emergency saw the fastest vaccine rollout the world has ever seen. Now it’s time to share just how remarkable that journey really was. The Delivery is a tool that allows you to explore the stories, statistics, and determination that underpin it all. Explore the triumphs and breakthroughs that kept us moving forward, perfectly preserving the efforts of our ...
How do vaccines work? - World Health Organization (WHO)
How vaccines help fight disease Vaccines contain weakened or inactive parts of a particular organism (antigen) that triggers an immune response within the body. Other vaccines contain weakened or reconstituted virus or bacteria as a whole. Newer vaccines contain the blueprint for producing antigens (DNA or RNA) rather than the antigen itself.
Immunization, Vaccines and Biologicals - World Health Organization (WHO)
The Immunization, Vaccines and Biologicals department is responsible for targeting vaccine-preventable diseases, guiding immunization research and establishing immunization policy.
Statement on the antigen composition of COVID-19 vaccines
The TAG-CO-VAC reconvened on 6-7 May 2025 to review the genetic and antigenic evolution of SARS-CoV-2; immune responses to SARS-CoV-2 infection and/or COVID-19 vaccination; the performance of currently approved vaccines against circulating SARS-CoV-2 variants; and the implications for COVID-19 vaccine antigen composition.
The different types of COVID-19 vaccines
Having lots of different vaccines in development increases the chances that there will be one or more successful vaccines that will be shown to be safe and efficacious for the intended prioritized populations. The different types of vaccines There are three main approaches to designing a vaccine.
Global vaccine market report 2024 - World Health Organization (WHO)
The insights from this report provide valuable market intelligence to governments, industry, global public health agencies, and other key decision-makers. It helps identify challenges and opportunities to accelerate equitable access to vaccines worldwide, aligning with the Call to Action issued in the 2022 GVMR, which remains highly relevant today.
Vaccines WPRO - World Health Organization (WHO)
Vaccines are available to prevent more than 20 life-threatening diseases, helping people live longer, healthier lives. They reduce risks of getting a disease by working with your body’s natural defenses to build protection. When you get a vaccine, your immune system responds.
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