In recent years, concerns about growing shortages of health professionals, in particular doctors and nurses, have emerged in OECD countries. These shortages are projected to increase over the next 20 years, unless countermeasures are taken, because
population ageing and changing technologies are likely to contribute to an increase in the demand for health workers, while workforce ageing will decrease the supply as the "babyboom" generation of health workers reaches retirement age. One route to partially meeting
such shortages is via international migration of health workers, a route which is already being utilised in OECD countries.