*Extracellular bacterial infection needs [[Immunoglobulins|'''antibody''']] production for [[Complement#Opsonisation|opsonisation]] and to activate the [[Complement|complement pathways]]
+
*Extracellular bacterial infection needs antibody production for [[Complement#Opsonisation|opsonisation]] and to activate the [[Complement|complement pathways]]
−
*[[Lymphocytes#B Cells|B cells]] are needed
+
*[[B cells]] are needed
*[[T cell differentiation#TH2 Cells|T helper type II cells]] are needed
*[[T cell differentiation#TH2 Cells|T helper type II cells]] are needed