Within the context of the Ricardian model of trade, suppose that the introduction of a vaccine against a virus increases the productivity of workers in the developing world. What would you expect wages to do?

Within the context of the Ricardian model of trade, suppose that the introduction of a vaccine against a virus increases the productivity of workers in the developed world. What would you expect wages to do? fall mainly in the developing countries.

b. take periodic breaks and alternate between tasks.  

will increase work efficiency, and avoid health issues.