Final answer:
The disease will spread faster in Community 2 compared to Community 1 because of its higher infection rate.
Step-by-step explanation:
The disease will spread faster in Community 2 compared to Community 1. This is because the infection rate of community 2 is much higher, with 80% of the population affected, compared to only 25% in Community 1. A higher infection rate means that a larger proportion of the population is susceptible to the disease and can spread it to others more easily.
For example, if we consider a population size of 100 individuals, in Community 1, 25 individuals are infected and can potentially spread the disease to 75 healthy individuals. In Community 2, however, 80 individuals are infected and can potentially spread the disease to 20 healthy individuals. Therefore, the disease will spread faster in Community 2 due to its higher infection rate.