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A systematic approach to preoperative testing. Abbreviations: CT, computerized scanning; PPE, personal protective equipment; RT-PCR, reverse transcription-polymerase chain reaction. *Given the very high rate of asymptomatic carriers and that various types of COVID tests are used throughout the world with different sensitivities/specificities, with false negatives periodically occurring, anesthesiologists should remain vigilant and wear PPE during aerosol-generating procedures.
