Samples were collected between November and December 2020, a period with sustained community transmission, which corresponded to a decreasing trend of the third wave in Cantabria: 193, 176, 107, 98 and 61 daily cases on November 12th, 17th, and 25th and December 4th and 11th, respectively (CNE 2022 ).
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SARS-CoV-2 surveillance in indoor and outdoor size-segregated aerosol samples.
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