H1N1 Vacc - Two Doses?

[HLAuburn]

For those of you with kids who have received the H1N1 vaccine, are you getting them a 2nd dose? DD5 had the mist, and the ped office said that she did NOT need another dose. I took youger DD to the health dept to get the shot (she's under 2), and they said she should come back for a 2nd round in a month.

I called the CDC and they gave me a generic response saying the recommend 2 doses for kids under 10, but it wasn't clear if that was mist, shot, or both.

Does anyone know? What sort of immunity does one dose give you? Have there been studies that you need the 2nd dose for full immunity? There's so much misinformation going around, I don't know who's right!

Thanks

 

[JessicaR]

How many doses of vaccine are required?
The U.S. Food and Drug Administration (FDA) has approved the use of one dose of 2009 H1N1 flu vaccine for persons 10 years of age and older. This is slightly different from CDC’s recommendations for seasonal influenza vaccination which states that children younger than 9 who are being vaccinated against influenza for the first time need to receive two doses. Infants younger than 6 months of age are too young to get the 2009 H1N1 and seasonal flu vaccines.

What is the recommended interval between the first and second dose for children 9 years of age and under?CDC recommends that the two doses of 2009 H1N1 vaccine be separated by 4 weeks. However, if the second dose is separated from the first dose by at least 21 days, the second dose can be considered valid.

http://www.cdc.gov/h1n1flu/vaccination/public/vaccination_qa_pub.htm

 

[hollieplus2]

We got DS9 the mist and they told us to come back in a month for another round. They said kids under 10 should get two doses since they are more likely to get the flu. We haven't decided on it yet. If it's still in such high demand and lots of people still haven't gotten their first dose then we probably won't but if it readily available then we probably will.

 

[laurie31]

The route doesn't matter (shot or mist) - children under 10 need two doses of H1N1 vaccine.

 

[paintnolish]

At the clinic we went to, ds (9) was told he didn't need another, but dd (8) did. Both got the mist.

 

[disney1990]

My 9 year old granddaughter got the shot and was told that she needed a second one in 28 days.

 

[Christine]

During the clinical trials of the H1N1 vaccine (which I believe are still ongoing), they discovered that children 9 years of age and under did not get the required immune response to the vaccine after one dose. They did get the required response after two doses. So, I think you child needs two doses. This information wasn't quite "settled" early on, but I think they have come to the conclusion, definitively, that two doses are needed.

It has nothing to do with how likely an age group is to getting the flu, it solely has to do with the body's response to the vaccine.

 

[TiggerStac]

at first they were not saying 2 doses, then it changed...at least that's what happened at my pedi's office.

I brought my middle ds in for his seasonal flu and he was able to get h1n1 mist. then brought oldest in and they had me schedule another. they said they had received info stating that younger kids need 2, as with seasonal flu. They were scheduled to get it tuesday....but they ran out, so now we have to wait.

 

[clovergirl5]

dc all received first shot a little over a week ago. dc under 10 go back in Dec. 4th for second shot. Hopefully they have the doses to give out. Our Ped. said 2 doses, a month apart = full immunity.

 

[npmommie]

there is so much confusing information out there.

i understand it has to do with them developing the antibody response. what doesn't make sense to me is for seasonal if they have had flu shot in the past they only need one.
but for h1n1 they need two.
but everything i read says the h1n1 would have been put in the seasonal if done early enough, so then would they only have needed 1?
the flu shot strains change each year, so if one is needed on seasonal, what is different that 2 is needed no matter what on h1n1.
and I understand that it has not been in humans in the past, but the whole putting it in the seasonal threw me off. because then it sounds like they would have only needed one if they had seasonal in past years.
or maybe they would have changed the recommendation to 2,

 

[Christine]

there is so much confusing information out there.

i understand it has to do with them developing the antibody response. what doesn't make sense to me is for seasonal if they have had flu shot in the past they only need one.
but for h1n1 they need two.
but everything i read says the h1n1 would have been put in the seasonal if done early enough, so then would they only have needed 1?
the flu shot strains change each year, so if one is needed on seasonal, what is different that 2 is needed no matter what on h1n1.
and I understand that it has not been in humans in the past, but the whole putting it in the seasonal threw me off. because then it sounds like they would have only needed one if they had seasonal in past years.
or maybe they would have changed the recommendation to 2,

I don't know what the cause is but it really has to do with what they are seeing in the lab. Maybe they thought there were would be enough of a response, but for some reason (they big unknown) there isn't. As I said upthread, they are seeing this in the clinical trials. They also do clinical trials on the seasonal vaccine and, I believe, that if they witness a lack of immunity developing they would also call for two shots.

It could just be this particular strain in a particular age group doesn't cause much of a response.

I know that I have heard that the seasonal flu shot (all years) actually doesn't produce much of an immune response in older adults and, therefore, is sometimes not as effective as it is in younger people

It could be that this is just one of those oddballl cases where younger people don't get a good response out of one dose.

 

[monkeybug]

My son gets his second dose tomorrow. He got the mist the first time, but will get the shot this time, as that is all that is currently available. The Dr. said it doesn't matter if they get mist or shot or both, but to be protected they need two.

 

[Tiger926]

Here in Canada it was just announced on Thursday that kids ages 3-9 only need 1 dose. They are using Spanish and Australian studies, I think?

It is interesting to see the differences between our 2 countries, which is funny as we work so closely together with these types of things: no flu mist in Canada, 1 dose in Canada and adjuvants in the vaccines (although there seems to be confusion regarding this one as U.S. says no adjuvants, but there might be?)

Tiger

 

[lovetoscrap]

They said that DD9 needs 2 doses. But it was such a struggle to get the 1st dose that I am not convinced that they will have any in a few weeks when she needs it.