According to the basic host–pathogen model of disease, if susceptible and infected individuals are the only types of individuals
in a population, then disease transmission is greatest when susceptible individuals are _______ percent of the population. [Hint: If the density remains the same, when is SI maximized?]
Contact occurs from a reservoir to contaminated surfaces or objects, or to vectors such as mosquitoes, flies, mites, fleas, ticks, rodents or dogs, etc. Indirect contact infections spread when an infected person sneezes or coughs, sending infectious droplets into the air.
When 50% of the population are infected, the disease transmission is said to be greatest.
