[Cellular immunological reactions in vivo and vitro in higher age (author's transl)]

It was established, that there gives no significant correlations between LTT, MMHT and the intracutanous skin-test. The results show, how multifarious and self-contained immunological reactions can be. The results show too, that the tuberculosis infection (tuberculin skin test) from people after the 60th living year is very lower (64%) compared to the people in the 40th living year.