Why are cancer patients often given `alpha`-interferon as part of the treatmet?

Why patent is given ?

Why are aeroplanes given conical shape?

In immune system, interferons are a part of

Who was first patient, who was given gene therapy? Why was the given treatment recurrent in nature?

Why are some patients of diabetes treated by giving injections of insulin?

Why are rockets given conical shape?

Transplantation of tissues / organs to save certain patients often fails due to rejection of such tissues/ organs by the patient. Which types of immune response is responsible for such rejections?

Why are infra-red waves often called heat waves? Explain.