# 3484
Yesterday’s report on the similarities between the 2009 H1N1 virus, and previous pandemic viruses (including 1918), stemmed from a study published in the journal Nature by a team of researchers led by the University of Wisconsin-Madison virologist Yoshihiro Kawaoka.
I’ve reproduced some of the University’s press release below, along with a fascinating photo of the swine flu virus. The virus particles are stained red to make them show up better, and as noted in the text below, are unusually shaped for influenza viruses.
Study suggests H1N1 virus more dangerous than suspected
July 13, 2009
by Terry Devitt
A new, highly detailed study of the H1N1 flu virus shows that the pathogen is more virulent than previously thought.
Writing in a fast-tracked report published today (July 13, 2009) in the journal Nature, an international team of researchers led by UW-Madison virologist Yoshihiro Kawaoka provides a detailed portrait of the pandemic virus and its pathogenic qualities.
In contrast with run-of-the-mill seasonal flu viruses, the H1N1virus exhibits an ability to infect cells deep in the lungs, where it can cause pneumonia and, in severe cases, death. Seasonal viruses typically infect only cells in the upper respiratory system.
"There is a misunderstanding about this virus," says Kawaoka, a professor of pathobiological sciences at the UW-Madison School of Veterinary Medicine and a leading authority on influenza. "People think this pathogen may be similar to seasonal influenza. This study shows that is not the case. There is clear evidence the virus is different than seasonal influenza."
