<span>There were probably several, but it is a deadly sickness if not treated and the outbreak in the middle ages killed 1/3 of Europe. Some cures were weird things like eating crushed emeralds or drinking poison. Some symptoms included swollen lymph nodes and bleeding out in many places </span>
The informal sector lacks land, capital, and technology, and can be less productive than formal enterprises, however, it can improve individual earnings and add money into the economy. It is the access to the market and power to purchase that can assist the productivity of the informal worker. If products can be sold on a cheaper mass scale to informal workers to use as a resource, this could help improve this sector to be more meaningful.