If there were no such thing as illness, the world would be a very different place. People would live longer, healthier lives, and they would be less likely to experience pain and suffering. There would also be a significant impact on the economy, as the healthcare industry would be much smaller.

Here are some of the specific ways that the world would be different if there were no illness:

* People would live longer. The average life expectancy would be much higher, as people would not die from diseases such as cancer, heart disease, or stroke. In fact, some experts believe that people could live for hundreds or even thousands of years.

* People would be healthier. Not only would people live longer, but they would also be healthier throughout their lives. They would not have to worry about chronic diseases, and they would be less likely to experience pain and suffering.

* The healthcare industry would be much smaller. The healthcare industry is a major part of the economy, but it would be much smaller if there were no illness. This is because there would be less demand for doctors, hospitals, and other healthcare services.

* People would have more time to enjoy life. If people were not sick, they would have more time to spend doing the things they love. They could travel, spend time with their families and friends, or pursue their hobbies.

* The world would be a happier place. A world without illness would be a happier place, as people would not have to suffer from the pain and suffering that is caused by disease.

Of course, there are some potential downsides to a world without illness. For example, people might become complacent and not take care of themselves, or they might become bored if they do not have anything to challenge them. However, on balance, the benefits of a world without illness would far outweigh the drawbacks.