id author title date pages extension mime words sentences flesch summary cache txt cord-310956-qwe4ndvb Qian, Yan‐Hua Attempted early detection of influenza A (H1N1) pandemic with surveillance data of influenza‐like illness and unexplained pneumonia 2011-04-18 .txt text/plain 3699 216 54 Background To collect disease information and provide data for early detection of epidemics, two surveillance systems were established for influenza‐like illness (ILI) and unexplained pneumonia (UP) in Wuxi, People's Republic of China. When the surveillance data of 2009 were fitted in the two detection models, alarms were produced on the occurrence of the first local case of influenza A (H1N1), outbreaks in schools and in general populations. Conclusions The results indicated the potential for using ILI and UP surveillance data as syndromic indicators to detect and provide an early warning for influenza epidemics. Two surveillance systems were established in Wuxi for influenza-like illness (ILI) and unexplained pneumonia (UP) after the severe acute respiratory syndrome (SARS) outbreak. To further evaluate the effectiveness of these surveillance systems in early warning of influenza epidemics, we monitored ILI data between 2004 and 2008 by both a control chart method and the Serfling method and tested goodness of fit using influenza A (H1N1) data of 2009. ./cache/cord-310956-qwe4ndvb.txt ./txt/cord-310956-qwe4ndvb.txt