Indicators of severity of disease by pathogen (influenza, RSV, AdV, hMPV, PIV1, PIV2, PIV3 and any coinfection).

Severe outcome is defined as illness requiring ventilation or intensive care or resulting in death. For each pathogen of interest, tested SARI patients with a positive result for that pathogen were compared to a reference group of tested SARI patients with a negative result for that pathogen. For “any coinfection”, tested SARI patients with any coinfection were compared to a reference group of tested SARI patients with test results for all pathogens of interest and no identified coinfection.