At about the 10-minute mark, the shadow of the Patagonia biplane (the one piloted by J. Fabian, played by Clark Gable) is shown over various parts of the pasture-lands of Argentina. The shadows cast over the horse and herd of cattle below are that of a biplane, but the shadow going over the flock of sheep is clearly that of a monoplane, not a biplane.
Everyone involved in sending the medicine to Rio de Janeiro is told that it is urgently needed for children in the infantile paralysis ward, that every hour counts. But the package is addressed only to "City Hospital," with no name or even department.