<unk> al H1N1 versus avian H5N1. This influences their lethality and ability to spread. US influenza<unk> tics by flu<unk> . From the Centers for Disease Control and Prevention page called "Disease Burden of Flu": "Each year CDC estimates the burden of influenza in the U.S. CDC uses modeling to estimate the number of flu illnesses, medical visits, hospitalizations, and deaths related to flu that occurred in a given<unk> . The methods used to calculate these estimates are described on CDC’s webpage, How CDC Estimates the Burden of<unk> al Flu in the U.S." The tables below include the latest available years the CDC has provided on their website.
United States influenza statistics by flu season
Global action plan for influenza vaccines
Timeline of human vaccines
Laboratory developed test
Timeline of influenza
Global Influenza Surveillance and Response System
Australian Vaccination-risks Network
VIOLIN vaccine database