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H1N1 Vaccine: Live, Attenuated Intranasal Spray (cont.)

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Can the nasal-spray swine flu vaccine be used together with influenza antiviral medications?

If a person is taking an influenza antiviral drug (including Tamiflu® or Relenza®, then the nasal spray flu vaccine should not be given until 48 hours after the last dose of the influenza antiviral medication was given. If a person takes antiviral drugs within two weeks of getting the nasal spray flu vaccine, that person should get revaccinated. (The antiviral drugs will have killed the vaccine viruses that are supposed to cause the immune response against those viruses.)

Antiviral drugs can be taken with the inactivated (i.e. killed) flu vaccine.

If a child under the age of 9 years is getting seasonal influenza vaccine for the first time and requires 2 doses, does the same type of vaccine have to be used for both doses?

Ideally the same type of vaccine should be used for both doses as we know a series of two doses of the same type of vaccine has worked in clinical trials. No information is available about how effective a series of two different vaccines might be. If different types of vaccine are used for the first and second doses, however, there is no need to revaccinate a child. The doses should be separated by at least one month (28 days).



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