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Originally Posted by dottiesyrky  I thought that for any flu season the vaccine included all the expected strains for that season, and that was the important factor...not how long the immunity lasted for. I also did not understand that there was more than one vaccine for any given flu season. For seniors they have an extra strong version.:-) |
I think the earlier ones may not include all stains for the season and this can only be known after people start getting the flu. After all, aren't scientists just guessing/predicting what they think may be the most prevailing strains?