We define batik design as employees within essential industries who must physically show up to their jobs. Rather than capture every worker within essential industries, we propose identifying a subset of workers in specific frontline occupations who face a variety of health risks in their workplaces.
Blood flow is slowest in the capillaries, which allows time for exchange of gases and nutrients. Resistance is a force that opposes the flow of a fluid. In blood vessels, most of the resistance is due to vessel diameter.