DALLAS — Some parents have temporarily removed their children from Dallas schools after learning five students may have come into contact with the first person to be diagnosed with Ebola in the U.S.

School administrators urged calm. None of the children have shown symptoms and are being monitored at home, where they will likely remain for three weeks, Dallas Independent School District Superintendent Mike Miles said.

But Marcie Pardo and other parents left L.L. Hotchkiss Elementary indicating they were taking no chances and would keep their children home for the rest of the week.

“Kids pretty much touch everything. Not everyone washes their hands,” Pardo said. “It’s the contagious part that gets me worried.”

Ebola isn’t contagious until symptoms appear, and then it can spread only by close contact with a patient’s bodily fluids. Pardo said that knowledge makes her feel better, but she still took her 8-year-old daughter home from school early, along with her cousin.

Tucked in a quiet neighborhood of tree-lined streets, Hotchkiss is one of four campuses in Dallas that Miles says the five students attended. He said the district is taking an “abundance of caution” and would add more health workers to keep watch for symptoms among students.

The district also planned to deploy more custodial workers to the campuses, which include another elementary school, two middle schools and a high school.