What exactly is herd immunity?

When enough of the population is resistant to a germ, its spread stops naturally because not enough people are able to transmit it. Thus, the “herd” is immune, even though many individuals within it still are not. How do you become immune? This can happen in two ways: 1. Many people contract the disease and in time build up an immune response to it (natural immunity). 2. Many people are vaccinated against the disease to achieve immunity. The bottom line Herd immunity is community or group protection that happens when a critical number of the population is immune to a certain disease. Many experts are suggesting that individuals who are young adults, free from disease and fit should be allowed limited exposure to COVID 19 virus, But as our knowledge about immunity development post-infection is not complete many scientists disagree.