Skip to main content

Table 1 Characteristics of influenza surveillance systems used in different countries

From: A profile of the online dissemination of national influenza surveillance data

Surveillance Methods Number (%) of countries (n = 70)
Community consultation rates of influenza-like illness 62 (89%)
Virological data by viral culture/RT-PCR and/or HI assays 31 (44%)
Number of institutional Outbreaks 9 (13%)
Hospital admission rates 7 (10%)
Mortality (Pneumonia and influenza) rates 7 (10%)
Emergency room visits due to influenza-like illness 5 (7%)
School/Workplace absenteeism rates 5 (7%)
Real-time internet survey 4 (6%)
Antiviral resistant strain surveillance 4 (6%)
Quick immunological assays data 1 (1%)
Over the counter sales 1 (1%)
Others 7 (10%)