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 this …
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 disease ...
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 defences to build …
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, WHO …
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 …
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 build …
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 virus? How is it …
Coronavirus disease (COVID-19): Serology, antibodies and immunity
Dec 31, 2020 · The answers to the questions below are based on our current understanding of the SARS-CoV-2 virus and COVID-19, the disease it causes. WHO will continue to update these …
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.
Tetanus - World Health Organization (WHO)
Jul 12, 2024 · Although this definition requires a history of injury or wound, tetanus may also occur in patients who are unable to recall a specific wound or injury. Treatment Tetanus is a medical …