91.   The stressed animals had thicker ears, containing many more immune cells in the skin, than did the unstressed animals.

92.   The three teams of researchers found that certain inactive immune cells hide in reservoirs in the body.

93.   The thymus is a major source in the production of immune cells.

94.   The skin cells also produced certain surface molecules, known as receptors, that are characteristic of immune cells.

95.   These are the swollen glands of an illness, special places where B cells meet antigens and rally with other immune cells.

96.   These chemokines summon immune cells such as monocytes and T cells to the central nervous system, where they attack the myelin.

97.   There are many kinds of immune cells, including T cells and different types of white cells.

98.   These drugs work by attacking rapidly-dividing cells, like tumor cells and immune cells that attack myelin.

99.   These tame tumor cells are supposed to emit hormones thatattract immune cells.

100.   Three still have undetectable viral loads, but the other three now have detectable virus and decreasing immune cells.