This study is checking if a medicine called *ravulizumab* can help people who have a kidney transplant. When you get a kidney from someone who has died, sometimes the new kidney doesn't work right away. This problem is called **Delayed Graft Function (DGF)**. The study wants to see if *ravulizumab* can make the new kidney work faster so people don't need dialysis, which is a treatment that cleans your blood.

Participants will get either *ravulizumab* or a fake medicine (a placebo) through a needle in their vein (intravenously). It's a double-blind study, which means neither the participants nor the doctors know who gets the real medicine or the placebo.

• Participants must be 18 or older and need a kidney transplant because of severe kidney disease.
• The study is for those getting kidneys from specific types of donors.
• You can't join if your kidney donor has certain conditions or if you have a severe kidney injury.