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CF Foundation guidelines encourage quarterly pulmonary function testing (PFTs) for all patients as part of routine care. The COVID-19 pandemic significantly affected our ability to obtain PFTs at recommended intervals, as patients were reluctant to come to the hospital and being advised to shelter in place to avoid unnecessary exposure to the Sars-CoV-2 virus. To obtain PFTs at our center during this time, we required negative Sars-CoV-2 testing for asymptomatic patients in the preceding 48–72 hours. We hypothesized that the extra trip away from home for viral testing affected our ability to adhere to the recommended PFT testing intervals. We sought to analyze the number of patients who did not have any PFTs completed since the start of the testing requirement. We also sought to analyze the positivity rate for Sars-CoV-2 associated with PFTs. All charts of CF patients ordered for PFTs and …