There was an increasing trend in the proportion of positive samples for SARS-CoV-2 RNA obtained from the top surface of the head within 3 hours, while no clear difference of positive rate between 3 hours and 4 hours ( P =0.909).
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Contamination dynamics of personal protective equipment (PPE) by SARS-CoV-2 RNA in a makeshift hospital with COVID-19 positive occupants.
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