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==Recent Developments==
Contact tracing in the late 19th century was mostly related to the large-scale public health crises such as cholera or tuberculosis outbreaks. However, increasingly medical science in the early 20th century realized contact tracing has a positive effect on other forms of infections. Sexually transmitted diseases, which were not well studied prior to the early 20th century, increasingly were treated similar to other infectious disease. In Scotland and UK, during World War I and after, venereal disease became a public health concern. When contact tracing was deployed, it created many problems for those who were seen as passing the infections, mainly women, and the authorities. While initially in the 1920s and 1930s, contact tracing for venereal disease was seen as a way for the authorities to track criminal activity as well as to socially ostracise individuals, public health officials began to change course in the 1930s and 1940s, focusing on conducting detailed interviews with infected individuals and reconstructing sexual history of individuals so that a more clear history of transmission could be developed. This was seen as vital given that the war year in the 1940s could have led to a more rapid spread of disease with the presence of more soldiers in the UK during the period between 1940-1944.
==Impact of Contact Tracing==
