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CDC: 1st swine flu vaccines may be nasal spray

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[September 19, 2009]  ATLANTA, Ga. (AP) -- The first doses of swine flu vaccine may all be the nasal spray version, government health officials said Friday.

The government has said a trickle of vaccine will be available in early October, but on Friday they defined the size of that trickle - an estimated 3.4 million doses.

Currently it looks like all of them will be a nasal spray vaccine that is approved only for healthy people ages 2 to 49, said Dr. Jay Butler, an official with the Centers for Disease Control and Prevention.

The nasal spray, called FluMist, is not recommended for some of the people most in danger of severe swine flu complications. That includes pregnant women, children younger than 2, and people with asthma and other chronic respiratory diseases.

However, it's possible that some vaccine shots will become available by the first week of October as well, said Butler, chief of the CDC's swine flu vaccine task force.

Flu shots are made of killed influenza virus, while FluMist is a live but weakened strain. The nasal spray is only approved in the United States, and is made by the Maryland-based MedImmune, an AstraZeneca PLC subsidiary. Four other companies are making flu shots for the U.S.

The initial vaccine doses will go to up to 90,000 sites, including schools and clinics, across the U.S. State health departments will determine which offices and clinics get the shots, and whether health care workers or others get the first doses, Butler said at a CDC press conference Friday.

The government has ordered 195 million doses and may order more if there's enough demand. Butler said it's good news that the flow of vaccines will start soon.

"When we open the faucet, there won't be a puff of smoke. There will be vaccine," he said.

FluMist was designed with kids in mind, and the company's research suggests it is more effective in youngsters than a shot in the arm against seasonal flu.

Studies in adults have found that shots are more effective. Some researchers think that's because adults have had longer exposure to flu viruses and flu vaccines and their immune systems don't respond as dramatically to the live-virus vaccine.

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Dr. Daniel Jernigan, deputy director of the CDC's influenza division, said there's not that much difference in effectiveness between age groups. "Either is better than nothing," he added.

One dose of vaccine should be enough for adults and older children, whether it's a shot or a spray. However, two doses probably will be needed for children younger than 10, CDC officials said.

Typically fewer than 100 million Americans get a flu vaccine every year, and it's unclear whether swine flu will prompt more demand. A recent Associated Press-GfK poll found 57 percent of people said they were likely to get it.

Twenty-one states are now reporting widespread cases of swine flu, CDC officials said Friday.

The CDC says swine flu hasn't proven to be more dangerous than seasonal so far, but it tends hit to younger people harder than traditional flu.

Because seasonal flu causes an estimated 200,000 hospitalizations and 36,000 deaths, that's still a serious health threat, officials said.

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On the Net:

CDC: http://www.cdc.gov/h1n1flu/

[Associated Press; By MIKE STOBBE]

Copyright 2009 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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