A team of two can train as many as 50 personnel over that four-hour time frame, USAMRIID told The Daily Beast. The training includes hands-on instruction on how to put on, remove, and decontaminate personal protective equipment, followed by a practical test to ensure that soldiers understand the procedures.

“All training is tiered to the level of risk each person may encounter,” said USAMRIID spokeswoman Caree Vander Linden.

The training process sounds daunting: One USA Today report described soldiers being told that Ebola “basically causes your body to eat itself from the inside out” and that Ebola is “worse” than what soldiers encountered in Afghanistan. Others reportedly heard that the disease is “catastrophic” and “frightening… with a high fatality rate,” though the chances of contracting it are low.

“I’ll be honest with you,” one soldier told the newspaper. “I’m kind of scared.”