Intravenous laser irradiation of blood (VLOK) is one of the most well—known methods of light therapy based on the effect of the energy of a quantum of light on the blood directly in the vascular bed. VLOK has a powerful cleansing and stimulating effect, it allows you to increase the immunity and rehabilitation capabilities of the body in a complex. The effect of the laser is very effective; the healing effect of the VLOK course lasts up to six months!