In March 2005, medical experts at the Centers for Disease Control and Prevention (CDC) announced that rubella (German measles), one of the greatest fears for expectant mothers, is no longer a health threat in the United States. A professor of medicine and infectious diseases at the Mayo Clinic said that we cannot stop immunizations as “cases continue to come in , particularly from the southern border.” Immigration laws require that legal immigrants have complete medical examinations to determine whether the immigrant carries any possible disease