1, Objective To investigate the changes of serum T helper cell (TH)1/TH2 type cytokines after the active immunotherapy in unexplained habitual abortion (UHA) women.

2, Objective To compare humoral immune responses and T helper cell polarization induced by different injection methods of a multi epitope chimeric DNA vaccine.

3, If a helper cell recognises an antigen, it becomes activated.

4, Objective:To investigate chang es in T helper cell subsets(TH1/TH2) ratio in blood and its potenti alrole in the pathogenesis of asthma.

5, When some one gets a virus and becomes ill, the helper cells kill off the virus and usually they get better.

6, HIV attacks a type of immune system cell called the T - helper cell.