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Stimulation of wound healing by means of laser rays. Part III--Investigation of the effect on immune competent cells.

The immune-suppressive action of laser rays was studied in directly irradiated human lymphocytes. It was found that the argon ion gas laser is more effective in the range between 488 and 501 nm than at other wavelengths and than the He--Ne laser (632 nm) of the same performance. It is assumed that the suppression of some undesirable immune reaction (auto-aggressive process) contributes to the stimulating effect of laser rays on wound healing.