Novel-coronavirus

Concepts for controlling microbial threats to human health

Preamble This is a work in progress. Feedback is welcome, appreciated, and valued. Introduction With the spread of novel coronavirus (COVID-19) many persons not trained in infectious disease transmission dynamics may not completely understand how and why public health officials implement interventions. Understanding transmission control measures requires some basic understanding of infectious diseases, infection control, clinical medicine, and mathematical epidemiology. We summarize the concepts as Transmission mechanisms (biology, behaviors, environments) Transmission dynamics (incidence, prevalence, attack proportion, case fatality proportion) Transmission containment (strategies, control measures) From these concepts emerge core strategies that are used to design control measures.

Prioritizing face masks and respirators during shortages

Preamble This is a work in progress. Feedback is welcome, appreciated, and valued. Key points In the setting of shortages, Respirators (N95 or higher) should be prioritized for health care workers in health care settings, or caregivers of confirmed cases, where the cumulative risk of acquiring an infection is highest. This is called respiratory protection. Face masks should be prioritized for symptomatic (infectious) patients when they are in close contact (within 6 feet) with susceptible persons, especially in a congregate settings such as a health care facility or crowded housing.