Coronavirus disease (COVID-19): Herd immunity, lockdowns and …
Dec 31, 2020 · Achieving herd immunity with safe and effective vaccines makes diseases rarer and saves lives. Find out more about the science behind herd immunity by watching or reading …
What is herd immunity? | New Scientist
The term herd immunity is usually used to refer to the idea that if a high enough proportion of a population is immune to an infectious disease – immune in the sense of not passing the …
Vaccines and immunization: What is vaccination?
Oct 22, 2025 · Vaccination is a simple, safe, and effective way of protecting you against harmful diseases, before you come into contact with them. It uses your body’s natural defenses to …
Vaccines and immunization - World Health Organization (WHO)
Dec 18, 2025 · 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 …
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 …
COVID-19 natural immunity - World Health Organization (WHO)
May 10, 2021 · This scientific brief replaces the WHO Scientific Brief entitled “’Immunity passports’ in the context of COVID-19”, published 24 April 2020. This update is focused on …
Interim statement on hybrid immunity and increasing population ...
Jun 1, 2022 · Moreover, hybrid immunity, although superior to infection- or vaccine induced immunity alone, depends on a number of factors in complex and interrelated ways. Meanwhile, …
Episode #67 - Understanding immunity
WHO’s Chief Scientist Dr Soumya Swaminathan explains how our body develops immunity against a new virus. How is immunity developed when we are infected with SARS-CoV-2 …
COVID-19: Science in 5: Episode #1 - Herd immunity
Aug 28, 2020 · Summary In this episode of Science in 5, WHO’s Chief Scientist, Dr Soumya Swaminathan explains herd immunity.
How vaccines work - World Health Organization (WHO)
Sep 24, 2015 · Building up immunity Immune systems are designed to remember; once exposed to a particular bacterium or virus, they retain immunity against it for years, decades or even a …