Influenza and Other Respiratory Viruses Involved in Severe Acute Respiratory Disease in Northern Italy during the Pandemic and Postpandemic Period (2009–2011)

Table 1

Impact of respiratory pathogens on the patients with SARI/ARDS (𝑁=206).

Pathogen	Number of positive samples
	SARI; (𝑁=91)	ARDS; (𝑁=115)	SARI/ARDS; (𝑁=206)
Influenza A(H1N1)pdm09 virus	58	62	120
hRV/hEV	7	4	11
Influenza A(H3N2) virus	7	1	8
RSV	3	1	4
hCoV	2	2	4
hPIV	2	2	4
AdV	2	0	2
Influenza B virus	1	0	1
hBoV	1	0	1
hMPV	0	0	0
Chlamydophila pneumoniae	0	0	0
Mycoplasma pneumoniae	0	0	0
Coinfections	2	3	5