Malaria is a contagious disease spread by mosquitoes. Mosquitoes bite an infected person and pass the disease along by biting an uninfected person.

Malaria is a contagious disease spread by mosquitoes. Mosquitoes bite an infected person and pass the disease along by biting an uninfected person. In developing nations, the spread of malaria can be diminished if people sleep underneath mosquito nets draped over beds. The accompanying graph shows the market supply and demand for mosquito nets.