Communicable diseases are a continuing threat to all people, regardless of age, gender, lifestyle, ethnic background or socioeconomic status. They cause illness, suffering and death, and place an enormous financial burden on society. Indeed, Joshua Lederberg, Nobel laureate once commented “We live in evolutionary competition with microbes – bacteria and viruses. There is no guarantee that we will be the survivors.” Although some communicable diseases have been controlled by modern advances, new ones are constantly emerging. The Washoe County Health District (WCHD) relies on healthcare providers, laboratories, and others to report the occurrence of notifiable diseases. Without comprehensive data, trends cannot be accurately monitored, unusual occurrences of diseases (such as Ebola Virus, Zika Virus, Covid-19) and outbreaks might not be detected or appropriately investigated, and the effectiveness of control and preventive measures cannot be easily evaluated. The intent of this report is to provide local health care providers, infection control practitioners and other interested persons with useful data.