The Kansas Department of Health and Environment (KDHE) is constantly evaluating whether or not other locations need to be added to the list of travel-based quarantines. A variety of factors are used to determine this list, but is based on the Centers for Disease Control and Prevention (CDC) guidance of community transmission. A formula is used to evaluate new cases over a two-week period, then it is adjusted for population size to provide a case rate per 100,000 population. This provides a number that can then be compared to the rate in Kansas. States with significantly higher rates -- approximately 3x higher -- are added to the list.