Coinfections and iterative detection of respiratory viruses among 17,689 patients between March 2021 and December 2022 in Southern France.

Objectives: We aimed to describe coinfections and iterative infections with respiratory viruses diagnosed over a 22-month period in 2021-2022 in public university hospitals of the second largest French city.

Material And Methods: Respiratory virus infections were diagnosed by qPCR with the Fast Track Diagnostics Respiratory Pathogens 21 on nasopharyngeal swabs collected between 01/03/2021-31/10/2022 and sent for routine diagnosis purpose to our clinical microbiology-virology laboratory at public university hospitals of Marseille, Southern France.

Results: Nasopharyngeal swabs from 17,689 patients were tested, of which 8,133 (46 %) were positive for ≥1 respiratory virus and 1,255 (15%) were co-infected with ≥2 viruses including 213 (2.