Retail store customer flow and COVID-19 transmission.

We examine how operational changes in customer flows in retail stores affect the rate of COVID-19 transmission. We combine a model of customer movement with two models of disease transmission: direct exposure when two customers are in close proximity and wake exposure when one customer is in the airflow behind another customer. We find that the effectiveness of some operational interventions is sensitive to the primary mode of transmission.

A new model of online health care delivery science education for mid-career health care professionals.

Health care delivery science focuses on ways to improve health and health care services provided to individuals and populations. Health care professionals must be trained in health care delivery science in order to diagnose and treat the sources of health care system dysfunction and achieve better outcomes while controlling costs. The ideal model for health care delivery science training has not been fully defined, but doing so is critical especially for frontline mid-career health care professionals whose original clinical training omitted these concepts.