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If we have never achieved herd immunity with the flu, the common cold and many other diseases, what makes it possible to reach herd immunity with COVID-19?

Infection and Spread Vaccines

A: Some diseases are more elusive than others when it comes to herd immunity, and your two examples are among the elusive ones. In order to be a candidate for herd immunity, we need a disease caused by one specific virus. The virus has to be easily recognized by the immune system; it can’t mutate