(NEWSER) – You might think of leprosy as a Biblical-era disease, but it's still around—now known as Hansen's disease—and two schoolchildren in California's Riverside County likely have it. As LiveScience reports, Hansen's disease is rare in the U.S., with just 100 to 200 cases reported in a typical year, and it's not clear where the children may have caught it. It's possible to get infected through contact with armadillos in the US, says one infectious-diseases specialist, but the risk is low.
It's also possible to get infected through "prolonged close contact" with others who have the disease, though probably not through casual contact. Plus, an estimated 95% of people are naturally immune. California officials are not overly concerned about contagion, the Los Angeles Times reports, but the Press-Enterprise notes that the school saw a high number of absences after the diagnoses.