Changes

On February 26, 2020, COVID-19 cases had been identified in about 36 other countries and territories, including the United States. Person-to-person transmission has been widely documented ((Burke, 2020). On January 20, state and local health departments in the United States, in collaboration with teams deployed from the Centers for Disease Control and Prevention (CDC), began identifying and monitoring all persons having close contact with confirmed COVID-19 patients (Patel and Jernigan, 2020). The aims of these efforts were to ensure rapid evaluation and care of patients, limit further transmission, and understand the risk factors for transmission.