MARTHA MENDOZA, AP National Writer

STANFORD, Calif. (AP) — Medical experts studying the spread of Ebola say the American public should expect more people infected with the disease to arrive here from West Africa before the end of the year.

Scientists have made educated guesses about future U.S. infections based on data models that weigh hundreds of variables, including daily new infections in West Africa, airline traffic worldwide and transmission possibilities.

This week, several top infectious-disease experts ran simulations for The Associated Press that predicted as few as one or two additional infections by the end of December to a worst-case scenario of 130.

Dr. David Relman is a professor of infectious disease, microbiology and immunology at Stanford University’s medical school. He says it’s possible that every major city will see at least a handful of cases.