01/04/2015 10:55 EST | Updated 03/06/2015 05:59 EST

Colorado-based soldiers return from Africa after helping with Ebola response

FORT CARSON, Colo. - About 100 soldiers deployed to West Africa to help build treatment facilities to house Ebola patients and caretakers are back in the United States.

The returning soldiers are being kept in a controlled monitoring area at Joint Base Lewis-McChord in Washington for 21 days.

During the monitoring period, the soldiers will not have physical contact with family members or other non-medical personnel, but they will have phone and email access to their friends and families.

The soldiers were part of a military program that includes units from the Active Army, Army Reserve and Army National Guard. Those who returned this week were part of a group of 150 soldiers from the 615th Engineer Company, 52nd Engineer Battalion who departed in November from Fort Carson, Colorado.

About 50 soldiers have remained in West Africa to provide assistance.