Table 2. Emergency Department ICD-10 Codes Used For Surveillance for Hospitalizations and Deaths Due To Acute Respiratory Illness.

Code	Diagnosis	% of Hospitalized Cases (N = 2113 )	% of Death Cases (N = 50)
J11	Influenza, virus not identified	0%	0%
J11.1	Influenza with other respiratory manifestations, virus not identified	27%	2%
J11.8	Influenza with other manifestations, virus not identified	25%	0%
J12.9	Viral pneumonia, unspecified	1%	0%
J15.9	Bacterial pneumonia, unspecified	1%	0%
J18.9	Pneumonia, unspecified	32%	72%
J22	Unspecified acute lower respiratory infection	12%	6%
J96.9	Respiratory failure, unspecified	2%	20%