
Vaccines and immunization: What is vaccination?
Oct 22, 2025 · The vaccine is therefore a safe and clever way to produce an immune response in the body, without causing illness. Our immune systems are designed to remember. Once exposed to …
Vaccines and immunization - World Health Organization (WHO)
Apr 6, 2026 · 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 …
Coronavirus disease (COVID-19): Vaccines and vaccine safety
Oct 8, 2024 · This page answers the most frequently asked questions about COVID-19 vaccines and vaccine safety. If the information you are looking for is not here, check out our related links on the …
Vaccines and immunization: Vaccine safety - World Health …
Jul 15, 2025 · Vaccination is one of the most effective ways to prevent diseases. Over the past 50 years, essential vaccines against just 14 diseases have saved at least 154 million lives (1). During the same …
What's in a vaccine? - World Health Organization (WHO)
Sep 4, 2025 · Live-attenuated vaccine A live-attenuated vaccine uses a living but weakened version of the virus or one that’s very similar. The measles, mumps and rubella (MMR) vaccine and the …
Know the facts - World Health Organization (WHO)
Mar 20, 2020 · 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 …
Statement on the antigen composition of COVID-19 vaccines
May 15, 2025 · 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 …
Vaccines WPRO - World Health Organization (WHO)
Sep 30, 2022 · 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 …
Recommendations for influenza vaccine composition for the 2026 …
Feb 27, 2026 · The World Health Organization (WHO) today announced recommendations for the viral composition of influenza (or “flu”) vaccines for the 2026-2027 northern hemisphere influenza season. …
WHO prequalifies an additional novel oral polio vaccine, strengthening ...
Feb 13, 2026 · The World Health Organization (WHO) has prequalified an additional novel oral polio vaccine type 2 (nOPV2), further strengthening the global supply of a vaccine at the heart of efforts to …