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.
Still, much more remains to be. done because there are no treatments for the vast majority of rare diseases. The Orphan Drug Act of 1983 provides incentives for drug companies to develop. treatments for rare diseases.