What countries qualify as third world countries?

The term "third world country" is often used to describe developing countries, which are countries that have a lower level of economic development than more developed countries. In general, third world countries tend to have lower per capita income levels, higher rates of poverty and disease, and less access to basic infrastructure like clean water and sanitation. Examples of third world countries include many African countries, like Somalia and South Sudan, as well as some countries in Asia and South America, like Afghanistan and Haiti.