There is a summary of 2 separate studies concerning immune cells
which has direct implication for the use of vaccines, and why they
may result in undesired/unanticipated effects. The summary appears in New Scientist magazine:
http://www.wemove.org/stayconnected/article.asp?ID=1161
Could vaccines result in immune responses in which
the correct immune cell Th1, morphs into the wrong cell, Th17,--causing
inflammation or autoimmunity when none was wanted?