Influenza‐like illness (ILI) definitions have been used worldwide for influenza surveillance.
These different case definitions can vary with regard to sensitivity and predictive values for …

Purpose To describe the burden, and characteristics, of influenza-like illness (ILI) associated
with non-influenza respiratory viruses (NIRV). Methods We performed a prospective …

Many viruses are known to cause influenza‐like illness (ILI); however, in nearly 50% of
patients, the etiologic agent remains unknown. The distribution of viruses in patients with ILI …

Objectives We aimed to identify patients' clinical characteristics associated with respiratory
viruses identified among patients presenting with influenza-like illness (ILI). Methods A …

Background Acute respiratory illnesses and influenza-like illnesses (ILI) are a significant
source of morbidity and mortality worldwide. Despite the public health importance, little is …

Background Limited information exists on the epidemiology of acute febrile respiratory
illnesses in tropical South American countries such as Venezuela. The objective of the …

Linking continuous community-based morbidity recording of influenza-like illness (ILI) with
virological sampling has consistently proved its value as one of the earliest indicators of …

Objective: Clinical case definitions used for influenza surveillance among hospitalized
patients vary and need systematic evaluation. Design, setting and sample: During July 2009 …

Influenza is one of the common etiologies of the upper respiratory tract infection (URTI).
However, influenza virus only contributes about 20 percent of influenza‐like illness patients …

Introduction During the first pandemic wave of the influenza A H1N1 2009 virus, morbidity
was particularly high in Brazil. Hospitalizations resulting from severe respiratory disease due …