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The two types are presented by Baxter (2007) “Following deep subcutaneous/intramuscular (SC/IM) administration of tetanus vaccine, the toxoid molecules are taken up at the vaccination site by immature dendritic cells: within this cell, they are processed through the endosomal pathway (involving the phagolysosome) where they are bound to major histocompatibility complex type II (MHC II) molecules; the MHC II: toxoid complex then migrates to the cell surface. While this process is happening within the cell, the now activated mature dendritic cell migrates along lymph channels to the draining lymph node where they encounter naïve T helper type 2 cells (TH2), each with their own unique-cell receptor (TCR). Identifying and then binding of the MHC II: toxoid to the specific TH2 receptor then activates the naive T cell, causing it to proliferate. Simultaneously, toxoid molecules not taken up by dendritic cells pass along lymph channels to