Berthe Badehi, who hid from the Nazis as a child during World War II, has become one of the many Holocaust survivors confined in their homes to evade the coronavirus. “It’s not easy, but we do it to stay alive,” the 88-year-old said of her current self-isolation at home in Israel. Movement and travel restrictions in place to contain the pandemic have forced this week’s Holocaust Remembrance Day — Yom HaShoah in Hebrew — to be exclusively digital for the first time.