In an expression of trauma shared by many survivors, “he can’t stand any light, or anyone cleaning,” said Ms. Shaul of the Jewish support foundation. The fear of change or loss of home means that institutionalizing the survivors is not an option. The former Communist countries of Central and Eastern Europe also lack nursing home facilities comparable to those in the United States, Australia or Israel, making home care all the more important.

The recent political shift to the right across much of Eastern Europe has exacerbated jealousies among neighbors, like the family living next door to Mrs. Varga, who threw rocks through her window after realizing she was receiving special services because she is Jewish. Under Prime Minister Viktor Orban, Hungary has become more tolerant of anti-Semitism, and Ms. Shaul said the foundation had seen an increase in episodes targeting survivors across the country.

Even for survivors who are more financially secure, like Agnes Bartha, 94, who lives in an airy eighth-floor apartment with a balcony, caregivers are like family. After a stroke last year, she needs a walker to move around and a caregiver to cook, clean and help her make sense of the 30 pills she must take daily.

Gone are the days when she could travel to Germany or visit Hungarian schools to tell children her story. Now, she relies on the internet to tell younger generations how in 1944 she was marched from Hungary to the Ravensbrück concentration camp, how she shocked an SS officer by insisting to him in fluent German that her friend join her as a slave laborer for Daimler-Benz, or how the “biggest present of my life” was a cup of tea handed to her after she escaped in the final days of World War II.

For a woman whose life depended on her perseverance and her ability to get by on her wit and fortitude, it is difficult to admit that she can no longer live independently.

“Because of my past and my physical condition, I need more and more help,” she said, leaning on her walker, decorated with a Mercedes-Benz star recovered from the archives of the Genshagen forced labor camp. “It is not easy when you lose your strength.”