Changes

Th1 cells interact with CD8⁺, NK and dendritic cells and Th2 cells interact with B cells. Th1 cells are involved with the control of intracellular pathogens and Th2 cells extracellular pathogens. Il-2 produced by Th1 cells stimulates further proliferation of CD4⁺ cells.</p>

Th1 cells interact with CD8⁺, NK and dendritic cells and Th2 cells interact with B cells. Th1 cells are involved with the control of intracellular pathogens and Th2 cells extracellular pathogens. Il-2 produced by Th1 cells stimulates further proliferation of CD4⁺ cells.</p>

<p>Th0 populations are CD4⁺ cells that have yet to differentiate into Th1 or Th2 cells and they secrete Il-2, IL-4, Il-5, IFN-γ. In the presence of Il-4 they develop into Th2 cells while in the presence of Il-2 they develop into Th1 cells. In the abscence of Il-2 Th1 cells will change into Th2 cells.</p>

<p>Th0 populations are CD4⁺ cells that have yet to differentiate into Th1 or Th2 cells and they secrete Il-2, IL-4, Il-5, IFN-γ. In the presence of Il-4 they develop into Th2 cells while in the presence of Il-2 they develop into Th1 cells. In the abscence of Il-2 Th1 cells will change into Th2 cells.</p>

<p>Th1 cells have two populations; one that secretes IFN-γ and is short lived, and the other that doesn’t secrete IFN-γ and is long lived. The IFN-γ^- cells are termed '''memory T cells'''</p>

<p>Th1 cells have two populations; one that secretes IFN-γ and is short lived, and the other that doesn’t secrete IFN-γ and is long lived. The cells lacking IFN-γ are termed '''memory T cells'''</p>

==Cytotoxic CD8⁺==

==Cytotoxic CD8⁺==