WHO: let’s change the definition of herd immunity to fit our narrative

9 JUNE 2020

What is herd immunity?

Herd immunity is the indirect protection from an infectious disease that happens when a population is immune either through vaccination or immunity developed through previous infection. This means that even people who haven’t been infected or in whom an infection hasn’t triggered an immune response, they are protected because people around them who are immune can act as buffers between them and an infected person. The threshold for establishing herd immunity for COVID-10 is not yet clear.


13 NOVEMBER 2020

What is herd immunity?

‘Herd immunity’, also known as ‘population immunity’, is a concept used for vaccination, in which a population can be protected from a certain virus if a threshold of vaccination is reached.

Herd immunity is achieved by protecting people from a virus, not by exposing them to it. Read the Director-General’s 12 October media briefing speech for more detail.