What Is Herd Immunity and How Do Vaccines Contribute?
Herd immunity occurs when a significant portion of a population becomes immune to a disease, either through vaccination or prior infection, thereby reducing its spread. COVID-19 vaccines play a crucial role in achieving herd immunity by reducing the number of susceptible individuals and interrupting transmission chains. However, achieving herd immunity for COVID-19 has been challenging due to factors like vaccine hesitancy and the emergence of new variants.
