This particular study is about inserting a gene variant that confers immunity to HIV into bone marrow. It's a pretty drastic step that was only happening becaus

This particular study is about inserting a gene variant that confers immunity to HIV into bone marrow. It's a pretty drastic step that was only happening because the patient had leukemia and was going to get a bone marrow transplant anyway. To do it for other viruses, you'd have to know a specific genetic variant that confers immunity.