Senate Bill 276 and Senate Bill 714: Vaccinations and Medical Exemptions Questions and Answers
What is “herd immunity”? “Herd immunity”, also known as “community immunity”, is the level of immunity that will prevent the spread of an infectious disease in a population. For measles, for example, the level of vaccination needed to achieve herd immunity is approximately 95%. If immunity is above the “herd immunity” threshold for a group …