<a target=_blank class=ftalternatingbarlinklarge href="http://www.medimmune.com/pdf/products/flumist_pi.pdf">Prescribing information for FluMist; warnings and precautions</a> It states there:
<div class="FTQUOTE"><begin quote><b>5.2 Asthma/Recurrent Wheezing</b>
FluMist should not be administered to any individuals with asthma or children <5 years of age with
recurrent wheezing because of the potential for increased risk of wheezing post vaccination <i>unless the
potential benefit outweighs the potential risk.</i>
Do not administer FluMist to individuals with severe asthma or active wheezing because these
individuals have not been studied in clinical trials.
<b>5.5 Medical Conditions Predisposing to Influenza Complications</b>
The safety of FluMist in individuals with underlying medical conditions that may predispose them to
complications following wild-type influenza infection has not been established. FluMist should not be
administered <i>unless the potential benefit outweighs the potential risk.</i></end quote></div> Because of this, it's been the experience here with everything I've read that FluMist (for either seasonal or h1n1 flu) is NOT given to those with CF.
Is h1n1 already rampant in your area and the mist the only vaccine that will be available for quite some time? If so, assuming the dr has some kind of reasoning for his recommendation- based on how that is worded he may feel that it's better to take this chance and treat the wheezing if it happens in the interests of protecting your child from the potentially more serious complications of the flu. I'd want to check again with him be very, very sure that he meant the mist though, vs. the shot/getting vaccinated in general.