Changes

Perhaps the most successful example of using contact tracing to diminish the effects of a disease is the example of smallpox, which was mostly eradicated by 1980 (Figure 2). This was mainly due to efforts of contact tracing, by isolating and treating infected individuals, and then also focus immunization efforts for people nearby. The World Health Organization perhaps established one of the largest contact tracing programs that now focused on the entire world. From the 1950s-1970s, contact tracing was used in developed and developing countries, where teams of volunteers, doctors, and individuals would go and interview people to determine the likely place in which an outbreak was present. This helped to track all major areas of smallpox that eventually led to its near eradication.<ref>For more on the success of smallpox contact tracing, see: McGuire-Wolfe, Christine. <i>Foundations of Infection Control and Prevention</i>. Burlington, MA: Jones & Bartlett Learning, 2018, pg. 11. </ref>

==Impact of Contact Tracing==