You do all understand that this outbreak was caused by a wealthy person (enough $ to be able afford Disneyland) who is not an undocumented immigrant? Never miss an opportunity to blame the "illegal" immigrants for whatever has happened or might happen in the future.
Don't let facts ever get in the way of a strong held wrong opinion. Google will give you data on the sources of measles cases in this country, and where internationally there are issues (hint, not Latin America).
From the CDC ( I know unreliable government agency peddling lies....)
"The number of reported measles cases in the United States has declined from nearly 900,000 annually in the early 1940s to an average of 83 cases annually from 2001 through 2011. As a result of high vaccination coverage and better measles control in the Americas, in 2000, measles was declared eliminated (no disease transmission for at least 12 months) in the United States.
Indigenous measles virus circulation was interrupted in 2002 in the rest of the Western Hemisphere. However, measles virus continues to be imported into the United States from other parts of the world. Globally, an estimated 20 million measles cases occur each year. Given the large global incidence and high communicability of the disease, travelers may be exposed to the virus in almost any country they visit, particularly those outside the Western Hemisphere, where measles is endemic or where large outbreaks are occurring. Of the 222 reported measles cases in the United States in 2011, 200 (90%) were associated with importations from other countries, including 72 direct importations (52 among US residents traveling abroad and 20 among foreign visitors). The largest percentage of importations (46%) was among people who acquired the disease in Europe. However, importations consistently occur from other countries and regions, including India and the Philippines."
Measles (Rubeola) - Chapter 3 - 2014 Yellow Book | Travelers' Health | CDC