Epidemiological characteristics of pandemic influenza H1N1 2009 and seasonal influenza infection.

@article{Kelly2009EpidemiologicalCO,
  title={Epidemiological characteristics of pandemic influenza H1N1 2009 and seasonal influenza infection.},
  author={Heath A. Kelly and Kristina Grant and Simon Williams and James E. Fielding and David Smith},
  journal={The Medical journal of Australia},
  year={2009},
  volume={191 3},
  pages={146-9}
}
The median age of patients with pandemic influenza H1N1 2009 infection was reported as 20-25 years in initial case series from Europe and the United States. This has been lowered to 13 years in the US after testing of more patients, but this may reflect differential increased testing of school-aged children as part of the pandemic response. The median age of patients with seasonal influenza A(H1N1) infection identified through sentinel surveillance in Western Australia and Victoria in 2007-2008… CONTINUE READING