In the absence of SARS-CoV-2 specific evidence, recommendations for fallow time following AGPs in the context of the SARS-CoV-2 pandemic range widely depending on country and specialty association.
The majority of recommendations are based upon dental practices and several on thoracic surgical practice.
The most common recommendations follow the CDC’s guidelines for airborne contamination removal based on air changes per hour ventilation properties of rooms.
Assuming that most treatment rooms have a minimum of 10-12 ACH, most associations recommend a 20-minute fallow periods, or 60 minutes if ACH is unknown or below recommendations for treatment rooms.
Badea, A; Groot G; Dalidowicz, M; Young, C; Miller, L. What are the recommendations around settling times following aerosol generating procedures on suspected or confirmed COVID-19 patients? 2020 Dec 1; Document no.: EOC081401v2 RR. In: COVID-19 Rapid Evidence Reviews [Internet]. SK: SK COVID Evidence Support Team, c2020. 24 p. (CEST rapid review report)