要算總帳的話，2009H1N1這隻virus和之前的seasonal flu 差不多，只不過侵犯年輕族群
在美國威斯康辛的資料如是說
2009H1N1 的嚴重性被overblown
How Bad Was the 2009 H1N1 Epidemic?
In one state, it looked much like usual flu, except that it struck a younger age group.
The hubbub surrounding pandemic 2009 H1N1 "swine" flu has died down, soon to be replaced, no doubt, with a similar 2010 version. Meanwhile, just how severe was 2009 H1N1 epidemic influenza compared with ordinary seasonal flu?
Researchers evaluated symptomatic residents in a cluster of Wisconsin zip codes during three periods in 2008–2009, including the summer and fall of 2009 when pandemic 2009 H1N1 was circulating but before the vaccine was widely available. The 545 participants with culture-confirmed pandemic 2009 H1N1 were on average much younger than the 632 people with seasonal influenza A H3N2 (median age, 10 vs. 25 years), but about the same age as the 221 people with seasonal (nonpandemic) H1N1. Symptoms were similar in all groups, although symptoms among both children and adults with pandemic H1N1 were perceived as slightly less severe than those of people with seasonal H3N2. Pneumonia was slightly more common among adults with 2009 H1N1 than among those with seasonal H3N2, but overall hospitalization rates in all groups were about the same. No participant was admitted to an intensive care unit, and no deaths occurred.
Comment: Stripped of hype, H1N1 appears to be a flu virus very much like all others, except that it tends to strike a much younger age group. This study lacked the power to prove that epidemic H1N1's clinical symptoms are no worse than those of the usual flu viruses, but the results add to the accumulating data suggesting that H1N1 severity was overblown.
— Abigail Zuger, MD
Published in Journal Watch General Medicine September 21, 2010
Citation(s):
Belongia EA et al. Clinical characteristics and 30-day outcomes for influenza A 2009 (H1N1), 2008–2009 (H1N1), and 2007–2008 (H3N2) infections. JAMA 2010 Sep 8; 304:1091. (http://dx.doi.org/10.1001/jama.2010.1277)
* Original article (Subscription may be required)
* Medline abstract (Free)
https://docs.google.com/fileview?id=0B278nGJMQBk7ZWNiN2Y0MWMtNDkyOC00MGYzLThhNzYtZDg4NTg1OTAyZDkx&hl=zh_TW
2009H1N1 的嚴重性被overblown
How Bad Was the 2009 H1N1 Epidemic?
In one state, it looked much like usual flu, except that it struck a younger age group.
The hubbub surrounding pandemic 2009 H1N1 "swine" flu has died down, soon to be replaced, no doubt, with a similar 2010 version. Meanwhile, just how severe was 2009 H1N1 epidemic influenza compared with ordinary seasonal flu?
Researchers evaluated symptomatic residents in a cluster of Wisconsin zip codes during three periods in 2008–2009, including the summer and fall of 2009 when pandemic 2009 H1N1 was circulating but before the vaccine was widely available. The 545 participants with culture-confirmed pandemic 2009 H1N1 were on average much younger than the 632 people with seasonal influenza A H3N2 (median age, 10 vs. 25 years), but about the same age as the 221 people with seasonal (nonpandemic) H1N1. Symptoms were similar in all groups, although symptoms among both children and adults with pandemic H1N1 were perceived as slightly less severe than those of people with seasonal H3N2. Pneumonia was slightly more common among adults with 2009 H1N1 than among those with seasonal H3N2, but overall hospitalization rates in all groups were about the same. No participant was admitted to an intensive care unit, and no deaths occurred.
Comment: Stripped of hype, H1N1 appears to be a flu virus very much like all others, except that it tends to strike a much younger age group. This study lacked the power to prove that epidemic H1N1's clinical symptoms are no worse than those of the usual flu viruses, but the results add to the accumulating data suggesting that H1N1 severity was overblown.
— Abigail Zuger, MD
Published in Journal Watch General Medicine September 21, 2010
Citation(s):
Belongia EA et al. Clinical characteristics and 30-day outcomes for influenza A 2009 (H1N1), 2008–2009 (H1N1), and 2007–2008 (H3N2) infections. JAMA 2010 Sep 8; 304:1091. (http://dx.doi.org/10.1001/jama.2010.1277)
* Original article (Subscription may be required)
* Medline abstract (Free)
https://docs.google.com/fileview?id=0B278nGJMQBk7ZWNiN2Y0MWMtNDkyOC00MGYzLThhNzYtZDg4NTg1OTAyZDkx&hl=zh_TW
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