WICHITA, Kan. -

More than 670 people have died in what health officials are calling the deadliest Ebola outbreak in history. Though it's primarily contained in West Africa, the deadly virus is taking a toll on one American family with Wichita ties.

Nancy Writebol, a 59-year-old missionary serving in Liberia, found out last week she had contracted the disease. She and her husband David have been serving as missionaries in Africa for about 13 years. One of their sons lives in Washington while their other son, Jeremy Writebol, lives and works as a church pastor in Wichita.

"My dad called us, my family, and we had been wondering in some ways, and he just kind of shared with us the hard news," said Jeremy. "Mom had been infected."

Nancy had been working closely with doctors treating patients with the Ebola virus. Now infected with the incurable disease herself, she's being kept in isolation.

“Dad’s visits with mom right now are through a window at the home where mom is isolated,” he said. “And he’s in a containment suit even there.”

Jeremy has talked with his mom on the phone every morning. He says she’s ‘stable’ but very weak. Right now they believe David hasn’t been infected. but he’s still self-monitoring just in case.

Now it’s a waiting game, one many would say doens’t have very good chances. The Ebola virus currently has about a 64 percent mortality rate. But that’s not stopping the Writebol’s from staying hopeful.

“That’s good news for us,” explained Jeremy. “We fee like that means mom has a chance.”

A chance to continue serving others, something Jeremy said his parents would rather die than waste.

“Mom and dad are not the people to run away from scary things and hardship, they’re not thrill seekers either,” he said. “But they know that God’s called them and that he’s with them and they want to spend and use their lives well.”

Nancy will have to remain isolated for at least three weeks while she tries to overcome the virus.

According to the CDC, an Ebola outbreak in the United States is unlikely, however, health officials around the world are warning doctors to closely monitor people traveling from the affected areas in Africa.