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This episode of American Epidemics is brought to you by Wondry in partnership with National Geographic, the hot zone,

starring Julianna Margulis, premieres this Memorial Day, May 27th at 9-8-Central on National Geographic.

It's September 2014 in Munrovia.

Thomas Eric Duncan stares down at the letter in his hand and tries to remember the last time he was this happy.

He, a citizen of war-torn Liberia, has secured a U.S. visa.

With this one piece of paper, Duncan can finally visit his family and reunite with Louise and their teenage son, Carzaya.

The two of them got their visas years ago, and now, finally, Duncan can see them again and leave his tiny apartment in Liberia's capital behind.

Thomas, Thomas, we need your help!

Duncan rushes to the door of his apartment and flings it open.

In the hallway, Martha Leigh, the daughter of his landlord, is doubled over in pain.

She's a woman not much older than his son, and seven months pregnant.

She's been helped down the stairs by her brother and her father, Duncan's landlord.

Duncan runs over and turns to the older man.

Is it the baby? I don't know. Help us get her downstairs.

Outside, Duncan flags down a taxi. He helps the girl and her family into the back, and jumps in next to the driver.

You know the main hospital? Get us there as fast as you can.

But the hospital is no help. It's totally overrun.

Panicked doctors scramble in every direction, dozens of people waiting to be treated.

The waiting room is a sea of misery. Duncan looks around. He sees people crying, moaning, sweating, leading, struggling to stay conscious.

He stops the passing doctor.

Excuse me. She needs help over here. We don't have a free bed. Take her home. She's in pain. Look at her.

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