If a person receives two live, attenuated intranasal H1N1 vaccines and it is less than 28 days, should one of the vaccines be repeated?
As little as 14 days (2 weeks) might be sufficient to allow for an appropriate immune response. Therefore, an interval between the two types of live, attenuated intranasal H1N1 vaccines may be acceptable, although an interval of 28 days is preferred. If the interval is less than 1-13 days, the vaccine more recently administered should be repeated.
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