The uncertainty of H1n1 outbreak about its severity, how one’s immunity react to the newly virus, and the fact that 
there is no vaccine available to cover this disease, can be projected in more hospitalizations and victims in the coming times. But, the increasing number of victims in US had been anticipated by The CDC with program called routine influenza surveillance systems which has activity to detect this ‘novel’ kind of virus.
It is the branch division of The Epidemiology and Prevention for Influenza of CDC which collect, compiles, and analize influenza year activity in US to be reported weekly in five categories so that CDC can take sufficient action such track influenza related illness, detect changes in influenza viruses, determine what influenza viruses are circulating and etc.
Below we provide you with article consists of information in what five categories of Influenza Surveillance which collected from nine different data sources. There are Viral Surveillance, Outpatient Illness Surveillance, Mortality Surveillance, Hospitalization Surveillance, and Summary of the Geographic Spread of Influenza. Each of these sections describe in detailed description.
Find complete read of Five Categories Data for Routine Influenza Surveillance Systems in 37.5 Kb of 4 pages pdf filetype available to download (source: cdc.gov).
