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Vaccines and immunization: What is vaccination?
Vaccines protect us throughout life and at different ages, from birth to childhood, as teenagers and into old age. In most countries you will be given a vaccination card that tells you what vaccines you or your child have had and when the next vaccines or booster doses are due. It is important to make sure that all these vaccines are up to date.
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.
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.
Immunization, Vaccines and Biologicals
The Immunization, Vaccines and Biologicals department is responsible for targeting vaccine-preventable diseases, guiding immunization research and establishing immunization policy.
COVID-19 vaccines - World Health Organization (WHO)
The COVAX No-Fault Compensation Program for Advance Market Commitment (AMC) Eligible Economies is the world’s first and only international vaccine injury compensation mechanism. The Program helps COVAX deliver safe and effective COVID-19 vaccines to the high-risk and vulnerable populations in 92 low- and middle-income countries and economies.
Recommendations announced for influenza vaccine composition for the ...
The World Health Organization (WHO) today announced its recommendations for the viral composition of influenza vaccines for use in the 2026 influenza season in the southern hemisphere. The announcement was made at an Information Meeting after a 4-day Consultation on the Composition of Influenza Virus Vaccines.
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.
The Oxford/AstraZeneca (ChAdOx1-S [recombinant] vaccine) COVID-19 ...
The Astra-Zeneca vaccine recommendations have also been modified to indicate that either of the mRNA COVID-19 vaccines (Pfizer or Moderna) can be used as a second dose following a first dose with the AstraZeneca vaccine dependant on product availability.
Counting the impact of vaccines - World Health Organization (WHO)
Vaccines benefit not only infants and children but also older people. They can prevent infection-related cancers caused by viruses like hepatitis and HPV, and protect the health of the working population, the elderly and the vulnerable, allowing people to live longer, healthier lives.
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