In the experimental block at Buchenwald, with Dr. Ding in charge, inmates of the camp were infected with typhus for the purpose of procuring a continuing supply of fresh blood taken from persons suffering from typhus. Other inmates, some previously immunized and some not, were infected with typhus to demonstrate the efficacy of the vaccines. Full particulars of these experiments have been given elsewhere in the judgment. Rose visited Buchenwald in company with Gildemeister of the Robert Koch Institute in the spring of 1942. At this time Dr. Ding was absent, suffering from typhus as the result of an accidental infection received while infecting his experimental subjects. Rose inspected the experimental block where he saw many persons suffering from typhus. He passed through the wards and looked at the clinical records “of * * * persons with severe cases in the control cases and * * * lighter cases among those vaccinated.” The Ding diary, under dates 19 August-4 September 1942, referring to use of vaccines for immunization, states that 20 persons were inoculated with vaccine from Bucharest, with a note “this vaccine was made available by Professor Rose, who received it from Navy Doctor Professor Ruegge from Bucharest.” Rose denied that he had ever sent vaccine to Mrugowsky or Ding for use at Buchenwald. Mrugowsky, from Berlin, under date 16 May 1942, wrote Rose as follows: “Dear Professor: “The Reich Physician SS and Police has consented to the execution of experiments to test typhus vaccines. May I therefore ask you to let me have the vaccines. “The other question which you raised, as to whether the louse can be infected by a vaccinated typhus patient, will also be dealt with. In principle, this also has been approved. There are, however, still some difficulties at the moment about the practical execution, since we have at present no facilities for breeding lice. “Your suggestion to use Olzscha has been passed on to the personnel department of the SS medical office. It will be given consideration in due course.” From a note on the letter, it appears that Rose was absent from Berlin and was not expected to return until June. The letter, however, refers to previous contact with Rose and to some suggestions made by him which evidently concern medical experiments on human beings. Rose in effect admitted that he had forwarded the Bucharest vaccine to be tested at Buchenwald. At a meeting of consulting physicians of the Wehrmacht held in May 1943, Ding made a report in which he described the typhus experiments he had been performing at Buchenwald. Rose heard the report at the meeting and then and there objected strongly to the methods used by Ding in conducting the experiments. As may well be imagined, this protest created considerable discussion among those present.