We analyzed wastewater samples from 14 aircraft arriving in Denmark directly from China during January 9-February 12, 2023. Wastewater from 11 aircraft was SARS-CoV-2-positive by PCR; 6 predominantly contained BQ.1 and XBB.1 subvariants. Wastewater-based surveillance can contribute to public health monitoring of SARS-CoV-2 and other emerging infectious agents.
Keywords: COVID-19; COVID-19 nucleic acid testing; China; Denmark; PCR; SARS; SARS-CoV-2; aircraft; coronavirus; coronavirus disease; respiratory infections; sequence analysis; severe acute respiratory syndrome coronavirus 2; viruses; wastewater; whole-genome sequencing; zoonoses.