Vaccines and immunization - World Health Organization (WHO)
May 29, 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 …
How vaccines have developed through history | World Economic Forum
Apr 23, 2026 · To mark World Immunization Week, we look back at the development of the world’s many life-saving vaccines, from smallpox and COVID-19 to a possible universal vaccine.
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 …
mRNA Vaccines - Here's Everything You Need to Know
Jul 1, 2021 · Since mRNA vaccines are based on sequences of viral proteins, making a new vaccine could simply involve changing the mRNA sequence if you know what protein you want to make. …
COVID-19 vaccines
May 15, 2026 · Yes, it is safe to receive other vaccines, such as the seasonal influenza vaccine, or those recommended during pregnancy, on the same day as the COVID-19 vaccine. This allows you …
Pfizer announces COVID-19 vaccine over 90% effective | World …
Nov 9, 2020 · A potential vaccine for COVID-19 has been reported to be 90% effective. The vaccine was developed by Pfizer and BioNTech and could be a major victory in the battle against COVID-19. …
How do vaccines work? - World Health Organization (WHO)
Feb 25, 2025 · This article is part of a series of explainers on vaccine development and distribution. Learn more about vaccines – from how they work and how they’re made to ensuring safety and …
From cholera to COVID: a brief history of vaccines
Apr 27, 2022 · To mark World Immunization Week, we look back at the development of the world’s many life-saving vaccines, which have eradicated smallpox and tackled COVID-19.
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 …
Measles - World Health Organization (WHO)
Nov 28, 2025 · WHO fact sheet on measles providing key facts and information on signs and symptoms, who is at risk, transmission, treatment, prevention and WHO's work on in this area.