Well industrial revolution was a period of time where humans started using machines instead of hand making stuff, so mankind use to develop machinery tools.
AIDS would be the disease you're referring to:)<span />
Not all industries prospered in the Boom in the 1920s of America.
Old industries such as Coal and Cotton did terribly in the Boom as people became interested in the new products such as clothes made from artificial material(polyester). Coal was an old source of power, in the 1920s oil and electricity became greatly used.
Agriculture was also poor many farmers left the farmland to find work in the city. As new people emerged, new demands also appeared. Instead of fresh fruits and vegetables, Americans preferred cereals and bread which lead to the decrease of demands in fruits.
In the 1920s, Argentina and Canada began to supply the world crops which lead to the drops of demands from USA directly. Later in the year Prohibition(anything related to alcoholic drinks was made illegal) was introduced which caused an instant drop to the demands of barley(barley was used for making alcoholic drinks such as beer)
<span>The Black Death (Bubonic Plague) followed the Trade Routes. The Trade routes provided access to all corners of the known world. The increased use of the trade routes ensured that the disease spread throughout the World. We should also remember that it was not just Europe and Africa that were devastated by the deadly disease. Countries such as China suffered horrendously from the 1328 outbreak with their population dropping from 125 million to 90 million during just the middle half of 14th century.
hope it helped:)</span>
