A private pilot licence (PPL) or, in the United States, a private pilot certificate, is a license that permits the holder to act as the pilot-in-command of an aircraft privately (not for pay).
One type of incentive is the orphan drug status, which provides tax reductions and the exclusive right to develop the cure for a specific condition for a period of seven years to companies attempting to cure rare diseases.n the world pharmaceuticals, the largest amount of money can be made by developing drugs that become the standard for curing common diseases. From a business perspective, having a large market ensures that a company can quickly recuperate the cost of development and can also realize the largest possible gain.
An orphan disease is defined as a condition that affects fewer than 200,000 people nationwide. This includes diseases as familiar as cystic fibrosis, Lou Gehrig's disease, and Tourette's syndrome, and as unfamiliar as Hamburger disease, Job syndrome, and acromegaly, or gigantism..