). Chile registers all public and pri-vate hospital patient discharge diagnoses in a central data set. A sub-set of respiratory specimens from these patients was tested using CDC reverse transcription–… Click to show full abstract
). Chile registers all public and pri-vate hospital patient discharge diagnoses in a central data set. A sub-set of respiratory specimens from these patients was tested using CDC reverse transcription– polymerase chain reaction (RT- PCR) pro-tocols* for influenza virus during routine clinical care or as part of national respiratory virus surveillance. The epidemic threshold used to delineate the influenza season was defined as the mean of weekly
               
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