Eighteen months into the COVID-19 pandemic, and as the world struggles with global vaccine equity, emerging variants, and the reality that eradication is years away at soonest, we add to notion of “layered defenses” proposing a conceptual model for better understanding the differential applicability and effectiveness of precautions against SARS-CoV-2 transmission. The prevailing adaptation of Reason’s Swiss cheese model conceives of all defensive layers as equally protective, when in reality some are more effective than others. Adapting the hierarchy of controls framework from occupational safety provides a better framework for understanding the relative benefit of different hazard control strategies to minimize the spread of SARS-CoV-2.
【저자키워드】 COVID-19, SARS-CoV-2, Transmission, hierarchy of controls, PPE, layered defenses, layered prevention, 【초록키워드】 Vaccine, COVID-19 pandemic, variants, Spread, SARS-CoV-2 transmission, Effectiveness, Control, eradication, Precaution, Protective, equity, reason, hierarchy, applicability, REALITY, precautions, effective, benefit, provide, conceive, 【제목키워드】 Safety, occupational, phase, Can, Applying,