Read the quote.

“Most people in rural areas are farmers, and when you have a disease like Guinea worm [a parasite], you are incapacitated, unable to continue with your work. By preventing the hundreds of thousands of cases that we do each year, we are freeing up that many more people to farm so that they will have food and be able to take care of their families.”

—Emmanuel Miri

Based on the quote, how can widespread disease affect a country’s economy?