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Clinical manifestations

* combination with 99% negative predictive value[24]

* decision guide for laboratory testing based on


* RT-PCR recommended vs antigen testing by Infectious Disease Society of America for diagnosis if testing is likely to change management[19]



* most common causes of secondary bacterial pneumonia[52][53]

Differential diagnosis


Comparative biology

More general terms

More specific terms

Additional terms


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Patient information

influenza patient information