But now, WHO has redefined herd immunity again, this time stating that herd immunity can be achieved only by mass vaccination programs – which, of course, is not true. The WHO's website, under a section about COVID lockdowns, states:
"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." In other words, the WHO is trying to make people believe that the only way they can be protected from a virus by means of herd immunity is to be vaccinated.

In the US, Dr. Anthony Fauci now says as much as 90% of the population may need to be vaccinated or infected to achieve herd immunity against COVID-19, admitting in a new interview that he has been intentionally raising the bar based, in part, on what he thinks the country is ready to hear. -GEG

The World Health Organization has changed the definition of "herd immunity," eliminating the pre-COVID consensus that it could be achieved by allowing a virus to spread through a population, and insisting that herd immunity comes solely from vaccines.

The change occurred on a section of the WHO's website entitled 'Coronavirus disease (COVID-19): Serology, antibodies and immunity'.

The WHO's original definition (archived here) states that herd immunity "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."