The revolution brought new diseases unknown to the people. As a result, the organisms involved in the diseases were altered and made them even more dangerous to people because they did not have any kind of immunity to the diseases. One disease that transformed when brought to the New World was syphilis. Syphilis began as a disease caused by a bacterium, but ended up becoming an infection transmitted through sexual intercourse and identified as a probable endemic cause. These infections have become more harmful and severe due to several environmental factors. Indeed, further problems with disease arose as the overcrowding of the population led to an escalation of sexual acts occurring more frequently as people began to engage in prostitution and some became more promiscuous, which likely fueled disease transmission. In addition to diseases caused by lack of immune defenses and diseases transmitted through sexual intercourse, other complications have arisen due to economic growth. Some of these changes have impacted those living in the city creating problematic issues such as; how to dispose of municipal waste and pollution that has contaminated water resources, as well as air pollution. There were areas that existed in conditions of scarcity, which increased the likelihood of viruses being transmitted. The viruses that were transmitted became epidemics, some of these diseases for example were measles, and among the best known were typhoid, diphtheria and smallpox. Other illnesses of a more serious nature were those caused by the overcrowding of living spaces and perhaps the harsh conditions caused in their working environments, some of these included tuberculosis and pneumonia. Another big problem occurred with the death rate versus birth rate for people living in urban areas. This generated a concern that could only be