Cuba's two-currency system - the Cuban peso and the CUC, which is also known as the "convertible currency" - has economic benefits. But the only way Cubans can earn in CUCs is by working in sectors that are connected to the outside world, such as tourism.<br /><br />The disparity is tempting many medical professionals to change careers.<br /><br />Al Jazeera's Teresa Bo reports from Havana, Cuba.
