Crit Care Resusc
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To quantify aerosol generation from respiratory interventions and the effectiveness of their removal by a personal ventilation hood. ⋯ In this human volunteer study, the administration of O2 15 L/min by face mask and 60 L/min nasal therapy did not increase aerosol generation beyond low levels. Non-invasive ventilation caused moderate aerosol generation and nebulisation therapy very high aerosol generation. The personal ventilation hood reduced the aerosol counts by at least 98%.