A virtual environment is a Python tool for dependency management and project isolation. They allow Python site packages (third party libraries) to be installed locally in an isolated directory for a particular project.
Define descriptive epidemiology. Describe uses strengths, and limitations of selected descriptive study designs such as ecologic study, case report, case series, and cross sectional survey. Define ration, proportion, and rate. Distinguish between crude and be able to calculate age adjusted rates using either the direct or the indirect method. Define standardized morbidity (or mortality) ration.