Which is not an indicator of disease spread?

Access to public transportation is not typically considered a direct indicator of disease spread in the same way that incidence rates, demographic information, and seasonal trends are.

Incidence rates provide direct quantitative data on the frequency of new cases of a disease in a population within a specified period, serving as a primary indicator of how quickly a disease is spreading. Demographic information, such as age, gender, and ethnicity, helps identify which populations are more susceptible to certain diseases, allowing for targeted public health interventions and understanding patterns of spread.

Seasonal trends often indicate variations in disease occurrence tied to environmental factors, such as weather conditions that foster the spread of infectious agents. For example, certain diseases may peak during winter months when conditions such as close proximity of individuals facilitate transmission.

In contrast, while access to public transportation can influence a population's mobility and interactions, it does not directly measure disease incidence or patterns of spread. It may indirectly impact spread by facilitating or limiting the movement of people, but it is not a statistical measure or trend associated with the prevalence or spread of disease.