{$mEDiAurl}


whAt is thE lECturE mAinly ABout
A．thE ComponEnts oF thE immunE systEm
B．why somE pEoplE ArE immunE From DisEAsE
C．A、sEvErE typE oF immunE rEsponsE
DAngErs oF DiFFErEnt typEs oF shoCk