Older people more susceptible to H7N9

[tetano]

Due to physical fitness, immune memory and other reasons, people of different age differences in resistance to influenza. Our existing summary 77 confirmed the age of the patient, and the 2009 H1N1 flu and H5N1 influenza has compared, found that older people more susceptible to H7N9. we have collected 77 age of 71 patients who diagnosed information using Google maps to record patient information in real time (
http://goo.gl/maps/np1Rz)
. In contrast, we analyse the 2009
5
months
-July 237 cases of infection with the H1N1 situation in Shanghai, and as of 2006, the World Health Organization published in 116 cases
of H5N1 cases. H7N9 infected intermediate values are 64 years of age, significantly higher than the H1N1
and H5N1 in the age of 24
to 18 years old. Persons over 50 years is significantly higher than the odds of contracting H7N9 people under 50 years of age. H1N1 2009 swine flu should not be susceptible to phenomena of the elderly many times in your life can be interpreted as the elderly infected by H1N1 and swine flu have a certain immunity to the 2009. Before 2013 H7N9 rarely infect humans, relative to the young man, the old man does not have the historical accumulation of resistance. H5N1 and
H7N9 avian influenza, but young people vulnerable to H5N1 infection, and older persons at risk of contracting H7N9, why is not clear. our H7N9 influenza vaccination, vaccine distribution policy is based on previous experience of influenza. Now we know that 2013
H7N9 and previous outbreaks in significantly different age distribution, therefore, in the formulation of prevention policies, requires special consideration to this point are different, and make the appropriate adjustments, in monitoring the epidemic priority screening older people, giving priority to elderly H7N9 vaccinations.

http://blog.sciencenet.cn/blog-514529-681767.html

 

[Pathfinder]

Re: Older people more susceptible to H7N9

Translation Google

H7N9 avian influenza Latest news: live poultry farms or as a source of infection, but did not find the H7N9 virus

2013-05-19 23:57:36

H7N9 avian influenza Latest news: the National Health and Family Planning Commission announced on the 18th China - World Health Organization of human infection with the H7N9 avian influenza prevention and control of the Joint Expedition inspection report "Total Review of the prevention and control of human infection with the H7N9 avian flu, said for H7N9 avian influenza virus there are many uncertainties.

The the national guard Planning Commission and the WHO joint study group pointed out that, far from live poultry farms detected the H7N9 avian influenza virus, but live poultry farms is likely to be H7N9 source of infection. Joint study group also believes that the likelihood of transmission of human infection with the H7N9 avian influenza virus from person to person, higher than any other known bird flu virus, must not be ignored. In addition, it is unclear why human infection with the H7N9 avian influenza severe cases mainly older men urban residents.
...

Comparing age distribution of H7N9 cases (104 cases) and 43 cases of the H5N1 cases (2003-2013)

The report said it is not clear why the infection severe cases of H7N9 avian influenza mainly older men urban residents.

This can have two explanations: one possibility is that their ways of live poultry and live poultry markets exposed to increased risk of infection; Another possible reason is similar to seasonal influenza in these cases is more a large number of mild cases and the tip of the iceberg of the symptoms of cases observed in the most vulnerable populations in that part of the deterioration of those infected. However, this hypothesis can not explain the gender differences between men and women.

Similarly, there is a need for further research to determine: live poultry really exposed to infection risk factors, or it just is a common habit of the older men urban residents of infection.
...

http://www.guancha.cn/society/2013_05_19_145736.shtml

 

[Pathfinder]

Re: Older people more susceptible to H7N9

Study reveals new details about H7N9 influenza infections that suddenly appeared in China

BLACKSBURG, Va., June 19, 2013 ? ...

Since June 7, 132 confirmed cases of human infection with H7N9 have been reported in China and 37 people have died, according to the World Health Organization. It is the first time human infection with the avian influenza H7N9 subtype has been detected, and researchers fear that this strain may have pandemic potential.

The possibility of an animal source of the infection is being investigated, as is the possibility of person-to-person transmission.

However, most people who contracted the disease reported having contact with live birds in a bird market prior to infection. Researchers at the Network Dynamics and Simulation Science Laboratory found that younger women generally have the most contact with poultry, but it is older men who are experiencing the most infections.

The findings suggest that there is something unique about older men that makes them particularly susceptible to H7N9. Their greater risk of infection is not just because they tend to spend more time exposed to an avian source.
...
To contain the spread of this strain of influenza, some Chinese live bird markets have been closed. It may help, but still does not explain the high infection rate of older men. Further studies are required to understand what other factors may be involved in transmission to help contain H7N9?s spread.
...
http://www.vtnews.vt.edu/articles/2013/06/061913-vbi-h7n9.html