医師の一分

アクセスカウンタ

zoom RSS 不足するワクチン/米国 新型H1N1インフルエンザ

<<   作成日時 : 2009/11/10 20:36   >>

なるほど(納得、参考になった、ヘー) ブログ気持玉 1 / トラックバック 0 / コメント 0

 水曜日の議会で、2つの州と市の保健当局者が、12月ことによると1月まで優先度の高い人たちへの十分なワクチンが提供できないと述べた。ワクチンが豊富に出回る頃には流行が終わっているかもしれない。
 州の保健担当者は、アラバマのワクチンの62%が12月1日過ぎても入手できないだろうと述べた。12月末か1月までに可能となるかもしれない。
 ミネソタ州セントポールの公衆衛生部長は、ハイリスクグループに十分なワクチンが行きわたるにはクリスマスから1月半ばになるだろうと述べた。
 連邦政府はH1N1インフルエンザワクチン2億5000万本を注文した。3億0800万人の全人口の需要に十二分だろうという。優先度が高いグループは1億5900万人である。今週現在で、3250万本が利用開始された。
------------
 10/30-11/1 ハーバード大による米国の調査で、親の40%がH1N1インフルエンザウイルスの予防接種を子どもに受けさせようとしたが1/3はできなかったという。ハイリスクの成人も同様に不幸な状況にある。同時に成人の約半数はワクチン接種への関心をほとんど示さない。
 連邦政府は2億5000万本をメーカーに注文している。
-----------------------
ワクチン不足がオバマ政権への信頼を徐々に蝕む/米国 新型インフルエンザ 緊急事態宣言
http://kurie.at.webry.info/200910/article_32.html
----------------------------------------------------
Flu outrunning vaccine, experts say
http://www.washingtonpost.com/wp-dyn/content/article/2009/11/04/AR2009110403874.html
By David Brown
Washington Post Staff Writer
Thursday, November 5, 2009

画像Shots may not be widely available until December or January
Federal officials Anthony S. Fauci and Nicole Lurie testify before members of Congress. (Alex Brandon/associated Press)

Two state and city public health officials briefing Congress on Wednesday said they don't expect to have enough pandemic-flu vaccine to meet the needs of their high-priority population groups until well into December, and possibly not until January.

The officials said that their predictions are a result of maddening vaccine shortages throughout the fall but that they amount to little more than guesses.

Federal health officials at the same briefing refused to endorse the gloomy timetable -- or any other one -- although they acknowledged that the current wave of H1N1 influenza may be mostly over by the time the vaccine is abundant.

"Current projections show that 62 percent of Alabama's vaccine will not be available until after December 1," Donald E. Williamson, the state's health officer, told a House Appropriations subcommittee. Offering flu shots to people outside the five priority recipient groups "may not be possible until late December or January."

The director of the public health department in St. Paul, Minn., said he thinks it will be "sometime between Christmas and mid-January" before there is enough vaccine to fully immunize the high-risk groups -- pregnant women, health workers, parents caring for newborns, people 6 months through 24 years old and chronically ill people ages 25 through 64.

"I don't think we'll have enough before then," said Rob Fulton, adding that what's true for St. Paul is probably true for all of Minnesota.

The federal government has ordered 250 million doses of pandemic H1N1 influenza vaccine. It has said that will be more than enough to satisfy demand among the country's 308 million residents. The high-priority groups include 159 million people.

As of this week, 32.3 million doses of pandemic vaccine had been made available to states and cities by the federal government, which is controlling the entire U.S. supply.

Members of the House Appropriations subcommittee on Labor, Health and Human Services, Education and Related Agencies repeatedly queried the federal officials about timelines for future supplies. While five weeks ago they were still predicting that there would be more than 100 million doses by now, none of the officials would hazard a guess.
ad_icon

"We have been working extremely hard with each manufacturer to make sure all of the stumbling blocks are out of the way," Nicole Lurie, assistant secretary for preparedness and response at the Department of Health and Human Services, told Rep. David R. Obey (D-Wis.), chairman of the subcommittee. "Flu is really unpredictable. We're pretty hesitant about projecting ahead more than week to week."

Thomas R. Frieden, director of the Centers for Disease Control and Prevention, also declined to look ahead, saying, "We have been burned, quite frankly, by predictions that have not come to pass." Under later questioning, he did say that "it is quite likely that the current wave of influenza will peak, crest and begin to decline before there are ample supplies" of vaccine.

Pandemic influenza -- defined as a highly contagious strain to which virtually everyone in the world is susceptible -- tends to move through populations in waves, sometimes over several years. For example, the Asian flu of 1957, which bears many similarities to the current pandemic, was responsible for about 60,000 "excess deaths" in the United States. About 40,000 occurred in the summer and fall of 1957, and 20,000 in the late winter and early spring of 1958.

The chief reason there is so little flu vaccine is that the novel H1N1 grows slowly in fertilized chicken eggs, the medium where it is made in industrial quantities.

Normally, vaccine-makers expect to get two to three doses of vaccine out of each egg injected. At the start of production in the summer, the yield was 0.2 to 0.5 doses per egg, said Robin Robinson, director of the Biomedical Advanced Research and Development Authority, which is part of HHS. After tinkering with growth conditions and other variables, it is now 1.3 to 2 doses per egg.

"If we had been getting 2.5 doses per egg [throughout the summer and fall], we wouldn't be having this hearing now," he said.

The vaccine shortage is the consequence of the virus's biology, not human laziness or incompetence, the officials told the lawmakers many times.

"I don't want people to get the impression that it is the drug companies' fault in not getting this delivered," said Anthony S. Fauci, director of the National Institute of Allergy and Infectious Diseases.

Government officials have asked the four makers of injectable vaccine to put most of their current production into multi-dose vials, which can be filled about five times more quickly than single-dose vials or pre-filled syringes and may save a little time.

----------------------------
Many can't find swine flu vaccine, but some don't want to, survey finds
http://www.washingtonpost.com/wp-dyn/content/article/2009/11/06/AR2009110603444.html
By David Brown
Washington Post Staff Writer
Saturday, November 7, 2009

About 40 percent of parents in the United States have tried to get their children vaccinated against the H1N1 flu virus, but only one in three has been successful, according to a survey released Friday. High-risk adults seeking the vaccine for themselves were just as unlucky finding it.

At the same time, about half of adults continue to express little interest in getting the vaccine now or later.

The survey by the Harvard School of Public Health sketches an American population split between people who are frustrated because they can't find the vaccine, and those who say they don't want it even when it arrives. Both groups present major challenges to public health -- one to satisfy and the other to convince.

Production of vaccine against the novel H1N1 flu strain is going much more slowly than anticipated because the virus grows so slowly. The federal government, which is buying all the pandemic vaccine and then distributing it to state and city health departments, has ordered 250 million doses from the manufacturers.

The brightest spot in the survey was the finding that 92 percent of the people who have unsuccessfully sought vaccination say they'll try again. At a news briefing Friday, Anne Schuchat, an epidemiologist at the Centers for Disease Control and Prevention, said she was heartened by that statistic.

"They weren't giving up. They recognize the value of trying to protect themselves with vaccine and sticking with it through the next several weeks," she said.
ad_icon

Healthy children are seeking vaccination at roughly twice the rate of chronically ill adults, even though both are among the groups targeted for vaccination.

"The proportion of parents who tried to get their kids vaccinated was larger than we anticipated," said Robert J. Blendon, a professor of health policy who led the survey team. "I think our sense was that people would start looking later in the season."

In the survey, conducted by phone on Oct. 30, 31 and Nov. 1, 41 percent of people with children under age 18 said they had sought vaccine for the children, but only one-third of them had found it. Twenty-one percent of high-priority adults had sought it, and one-third had found it.

At the other end of the spectrum were adults who hadn't been vaccinated at the time the surveyors called. Sixty-two percent of them said they "will not try" to get vaccinated.

The survey polled 1,073 adults. It has a margin of error of about 4 percentage points.

テーマ

関連テーマ 一覧


月別リンク

ブログ気持玉

クリックして気持ちを伝えよう!
ログインしてクリックすれば、自分のブログへのリンクが付きます。
→ログインへ
気持玉数 : 1
なるほど(納得、参考になった、ヘー)

トラックバック(0件)

タイトル (本文) ブログ名/日時

トラックバック用URL help


自分のブログにトラックバック記事作成(会員用) help

タイトル
本 文

コメント(0件)

内 容 ニックネーム/日時

コメントする help

ニックネーム
本 文
不足するワクチン/米国 新型H1N1インフルエンザ 医師の一分/BIGLOBEウェブリブログ
文字サイズ:       閉じる