Per the manufacturer's clinical studies they were able to isolate live virus from 80% of vaccinated patients, with a mean duration of 7.6 +/- 3.4 days.
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<br>Based upon this, it is POSSIBLE to contract it up to probably 1-1.5 weeks after the FluMist is given.
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<br>However, there is no way to determine the exact risk to your child; but their study implies it is <1% for 1 vaccinated child, and one non-vaccinated child in a daycare setting.<br>