[Causes of exacerbation of diseases in the spring and fall].

The author draws attention to the fact that marked semi-annual changes of geomagnetic disturbances in spring and autumn could contribute also to the development or exacerbation of some pathological conditions. It is known that this semi-annual variation is displayed in particular by peptic ulceration of the stomach and duodenum, some forms of bronchial asthma, endogenous depressions, tetanic syndrome and liability to hyperglycaemia in obese diabetics. He refers to the parallel phenomenon in cardiovascular disorders. The author proved already previously that short-term (semilunar) geomagnetic changes correlate with adverse influences on the cardiovascular system, although the mechanism is probably different. He reflects also why in this context there are not two peaks of cardiovascular deaths in the course of the year. The concept of living environment is extended in recent decades also to cosmic space. Although some pathological conditions have a complicated genesis, in serious research it probably will not be possible to omit cosmic influences.