Community immunity is only effective if at least ____ percent of the population is vaccinated against a disease.

A) 60
B) 72
C) 80
D) 92
E) 100

Community immunity, often referred to as herd immunity, typically requires a high percentage of the population to be vaccinated to be effective. The exact percentage can vary depending on the disease, but for many diseases, especially those that are highly contagious, the required vaccination rate can be 90% or higher. 92% is a representative figure for some of the most contagious diseases, indicating a high threshold needed to prevent outbreaks through community immunity.