Aharon Hoter-Yishai (January 1, 1905 - May 20, 2003) was the Israeli Military Advocate General in 1948-1950 and testified at the Eichmann trial in 1961.
He was tasked with coordinating the activities of the Brigade by Yehudah Arazi of the Aliyah B Organization.
[1] He visited several of the Nazi camps and places where Jewish survivors were including Freimann Flak-Kaserne and the St. Ottilien Archabbey.
From the physical point of view, everything was done, to a certain extent, especially during the first stages, in order to put them back on their feet, as far as that was possible.
If my memory serves me correctly, there were, at the time, in Bergen-Belsen, 52,000 refugees, of whom 27,000 died in the course of receiving medical treatment.