China - Flu B Becoming More Prevalent, A/H1N1 Will Be Circulating for 2 Years

[sharon sanders]

<table align="center" border="0" cellpadding="0" cellspacing="0" width="530"><tbody><tr><td class="fb24" style="padding: 10px 0px;" align="center">China A total of 796 cases of death of the spring and summer flow is still possible outbreak of epidemic </td></tr><tr><td background="http://images.china.cn/images1/ch/07news/b_13.gif" height="1">
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新闻中心-中国网news.china.com.cn时间： 2010-03-11　　责任编辑: Tina​

News Center - China Net news.china.com.cn Time: 2010-03-11 Editor: Tina </td></tr><tr><td class="f14_000000" id="fontzoom"><!--enpcontent-->

中新社北京3月11日电(记者曾利明)截至3月7日，中国内地31个省份共报告确诊甲型H1N1流感病例127427例。​

China news agency, Beijing, March 11 (Reporter Zeng Liming) - As of March 7, the Chinese mainland reported a total of 31 provinces confirmed influenza cases 127,427 cases of Influenza A H1N1.

其中危重病例8320例，死亡796例。​

Severe cases of which 8320 cases, 796 cases of death.

目前疫情在有些国家仍然处在高发状态，中国极有可能在南方夏天以及全国冬春季造成新的爆发流行。​

The current outbreaks in some countries are still in the high state, China is very likely in the south in the summer and winter and spring the country creating new outbreak.

这是中国疾病预防控制中心病毒病预防控制所副所长、国家流感中心主任舒跃龙今天发布的信息。​

This is the Chinese Center for Disease Control and Prevention of Virus Disease Control and Prevention deputy director of the National Influenza Center Shuyue Long, director of the information released today.

他在国家卫生部召开的甲型H1N1流感防控通气会上称，去年5月11日内地报告首例输入性病例，8月底后疫情快速上升，11月初至12月初达到流行高峰；今年1月以来流感活动接近往年同期水平。​

He was held at the national Ministry of Health, Influenza A H1N1 influenza prevention and control of Lash said last year, May 11 days to report the first case of imported cases, by the end of August the epidemic after a rapid increase in early November to early December reached epidemic peak; in January of this year Over the same period in previous years has been close to the level of influenza activity.

病原学监测结果显示，近几周B型流感不断上升，但甲型H1N1流感仍占一定比例。​

Pathogen monitoring results show that the rise in recent weeks, influenza B, but still a certain proportion of influenza A H1N1 influenza.

他透露，历次流感大流行的经验表明，流感疫情通常会持续2年以上，然后转变为季节性流感。​

He revealed that previous experience has shown that an influenza pandemic, influenza epidemics usually last about two years, and then transformed into seasonal influenza.

因此此次甲型H1N1流感将会在全球流行相当长一段时间。​

Therefore, the H1N1 Influenza A global epidemic of influenza will be a fairly long period of time.

世界卫生组织专家认为，虽然多数国家的监测结果显示甲流活动持续下降，处于低流行水平，但少数地区仍报告出现新的社区传播疫情。​

World Health Organization experts believe that, although most countries monitoring results indicate that a flow activity continued to decline in popularity at a low level, but a few areas still report the emergence of new communities spread of the epidemic.

因此世卫组织到目前为止并未调整流感大流行的防控级别。​

So far the WHO did not adjust the level of an influenza pandemic prevention and control.


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[Missouriwatcher]

Re: China - Flu B Becoming More Prevalent, A/H1N1 Will Be Circulating for 2 Years

CDC Taiwan shows isolation of 2 (H1N1) and 3 (InfB) last week.
http://www.cdc.gov.tw/public/Data/031116271871.pdf

 

[tetano]

Re: China - Flu B Becoming More Prevalent, A/H1N1 Will Be Circulating for 2 Years

Beijing, March 11 Xinhua News Kim Jin-Ya was held today from the Ministry of Health, "Influenza A H1N1 influenza prevention and control of media briefing," was informed that, according to a recent serological survey data show that China's population in a flow of antibody level of protection is only 30 % of rural areas, protective antibody levels than the city is even lower. Experts believe that a stream is very likely in our country, as well as the South summer, winter and spring the country creating new outbreak. According to the China Center for Disease Control and Prevention of Virus Disease Control and Prevention deputy director of the National Influenza Center director Shu Yuelong introduced, according to the characteristics of influenza and previous experience has shown that an influenza pandemic, influenza pandemics have typically will last two years, and then into the season influenza. World Health Organization experts believe that, although the current global and regional influenza activity in most countries at a low level, but there are still some communities and regional reporting of new outbreaks, so there is no influenza pandemic level of adjustment. In the upcoming sub-tropical countries and regions in the peak summer season, as well as winter and spring peaks, a flow is still the most likely major pandemic virus. "It is still a relatively good vaccination period, in rural areas should be of particular concern." Chinese Center for Disease Control and Prevention, immunization program director of the Center LIANG that in the past mainly on account of the urban population density, likely to cause outbreaks of infectious diseases, so the focus Area cities have began to start, and now gradually extended to rural areas. As the World Health Organization recommendation of a popular season for seasonal influenza vaccine composition containing a stream of components, this winter and next spring in China still would recommend influenza vaccine containing H1N1 influenza vaccine components. Judging from the current master of the situation, the United States, Japan and other developed countries, a flow rate of vaccination is much higher than China, but still a large number of influenza vaccination. China will actively promote the flow of the broad masses to actively immunized A vaccine.

http://www.gmw.cn/content/2010-03/12/content_1070697.htm

 

[Pathfinder]

Re: China - Flu B Becoming More Prevalent, A/H1N1 Will Be Circulating for 2 Years

<TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#ffffff border=0><TBODY><TR><TD class=f-title height=40>A/H1N1 influenza still a long-term threat: Chinese epidemiologists<!-- end_t -->



</TD></TR><TR><TD height=5></TD></TR></TBODY></TABLE><TABLE cellSpacing=0 cellPadding=0 width="100%" bgColor=#ffffff border=0><TBODY><TR><TD class=sj align=left width="43%">English.news.cn 2010-03-12 14:34:38</TD></TR></TBODY></TABLE>​

BEIJING, March 12 (Xinhua) -- People with chronic diseases, the obese, and pregnant women face a renewed threat of contracting deadly infection of A/H1N1 influenza as spring draws near.

Severe and fatal cases peaked in early and mid December last year, and have been dropping gradually since, but the disease threatened a resurgence as the weather warmed up, senior epidemilogists have warned.

"A new outbreak of A/H1N1 influenza is possible during this winter-spring season, and especially in the southern areas during summer," said Shu Yuelong, director of the Chinese National Influenza Center, which is affiliated with the Ministry of Health, at a meeting Thursday.

Cases of patients with chronic diseases, pregnant women and obese people were much more likely to become severe or even fatal.
Pathogenic studies showed a very small chance of the A/H1N1 virus mutating during this winter and spring, so vaccination was still essential to prevent potential outbreaks.

Analyses of past flu outbreaks showed a pandemic usually lasted more than two years before turning into seasonal flu, said Shu. "So the A/H1N1 influenza might be prevalent in the world for a considerably long time."

Experts said the government should promote vaccinations for high-risk groups, people in rural areas and migrant workers in urban areas.

According to the Chinese Center for Disease Control and Prevention, about 35,000 pregnant women and 37,000 children aged 6 months to 3 years had been inoculated with the A/H1N1 flu vaccine and no severe adverse reactions had been reported.

As of March 7, the Chinese mainland had reported a total of 127,427 cases of A/H1N1 flu, of which 8,320 were severe and 796 people had died.

<!-- end_ct --><TABLE cellSpacing=0 cellPadding=0 width=625 align=center border=0><TBODY><TR><TD class=zrbj height=24>Editor: Lin Zhi

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http://news.xinhuanet.com/english2010/health/2010-03/12/c_13208054.htm

 

[Sally Furniss]

Re: China - Flu B Becoming More Prevalent, A/H1N1 Will Be Circulating for 2 Years

WHO: Influenza B gaining foothold in more countries

Lisa Schnirring

Staff Writer

Mar 12, 2010 (CIDRAP News) – Though pandemic flu is circulating at low levels in many parts of the world, Thailand and some West African nations are reporting increased activity, and the virus is being edged out by influenza B in China and other Asian regions, with signs of westward spread, the World Health Organization (WHO) said today.

Alhough surveillance information is limited in the West Africa area, the WHO said community transmission is occurring without any sign of a peak. Senegal, Cote D'Ivoire, and Rwanda are among the countries reporting increased flu activity, but so far little is known about the clinical patterns of the illnesses there, the group said in its weekly update.

Pandemic flu activity persists throughout South and Southeast Asia, with Thailand reporting the region's highest level of activity since the middle of January. Though about 25% of Thai patients with flu-like illness are testing positive for influenza, the WHO said the increase is well below the peak the country experienced last summer.
Mongolia reported a sharp increase in flu activity, attributed mostly to an increase in influenza B activity. Though pandemic flu activity declined in neighboring China, influenza B activity continued to increase.

Influenza B virus circulation seems to be moving westward, with the Russian Federation and Sweden now reporting that the virus is cocirculating with or dominating the pandemic virus. Iran also reported that, although flu activity is low, all recent detections have been influenza B.
Some countries reported increases in respiratory disease activity, though not all of it is thought to be pandemic flu, the WHO report said. For example, Afghanistan reported increased respiratory disease with a moderate impact on the country's health system. Bangladesh, Nicaragua, Honduras, and Brazil also reported similar increases.

The United States hasn't seen a spike in influenza B detections, though the US Centers for Disease Control and Prevention (CDC) said today that it is circulating at low levels. The nation saw a surge of influenza B cases near the end of the 2008-2009 flu season, which was problematic, because the B strain that was circulating didn't match the one contained in the seasonal flu vaccine. So far the influenza B strains identified at US labs this flu season are a good match for the current seasonal flu vaccine.

Vincent Racaniello, PhD, a virologist at Columbia University who writes Virology Blog, told CIDRAP News that the influenza B pattern the WHO is reporting is typical. He said the two main lineages, B/Victoria-like and B/Lee-like, have been cocirculating for 25 years, with changing patterns of prevalence and geographic distribution.

"There are frequent bottleneck years during which prevalence of B strains is low; this usually corresponds to high prevalence of influenza A strains," he said. "Once the bottleneck is relieved, there are usually changes in the prevalence of the two B lineages."
The current spread of influenza B may be a reflection of waning pandemic H1N1 activity that has occurred later in the Northern Hemisphere's flu season, Racaniello said.

Experts have noted that influenza B viruses in general cause less severe disease than influenza A and are associated with smaller disease clusters and illnesses in younger people, though hospitalizations and deaths from influenza B infections are seen in all age-groups.
In an accompanying update on oseltamivir-resistant pandemic H1N1 viruses, the WHO said it received no new reports of cases last week and said all have the H275Y substitution and are sensitive to zanamivir. The organization characterized the cases are sporadic, with rare onward transmission.
See also:

Mar 12 WHO global flu update
Mar 23, 2009, CIDRAP News story "TypeB viruses rise as overall flu activity declines"
Mar 12 WHO antiviral resistance update
http://www.cidrap.umn.edu/cidrap/content/influenza/swineflu/news/mar1210global-jw.html