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Last login: Tuesday, December 14, 2010
I'm so glad to hear that Matthew is OK. But I was also relieved to hear that he didn't contract it from anyone in his family. Seems pretty clear that the vaccination worked, and is working, perfectly fine in Matthew's family, since they haven't contracted it from him. So I'm not sure why Matthew is used as an example of the efficacy of pertussis vaccines.
December 14, 2010 at 10:32 a.m.
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