He was also first to co-culture human embryos with helper cells to promote growth.

They are a kind of reserve cell which turn into macrophages and immune helper cells called dendritic cells.

The serological workup had shown a raised level of lymphocytes, the white helper cells in the bloodstream that responded to an attack by foreign microbes.

The helper cells can never multiply to the number needed to orchestrate a full and effective immune response, because the virus is picking them off.

They are also called "helper cells."

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

Someone who is ill in this way, because the helper cells don't work, is said to have AIDS.

As H.I.V. status worsens, counts of these helper cells decline.

AIDS ravages the body's helper cells, and counts dip to zero as the disease progresses.

After 10 weeks of moderate aerobic exercise, those with H.I.V. also showed an increase in the numbers of helper cells.