Four Americans who recently returned from Sierra Leone are being monitored for the Ebola virus at the University of Nebraska Medical Center in Omaha, the hospital announced Saturday.
The patients — who may have been exposed to the disease but currently show no symptoms — will be monitored for 21 days, the maximum Ebola incubation period, Reuters reported.
An American health care worker who tested positive for Ebola was transported to the National Institutes of Health in Maryland last week and was said to be in serious condition.
There have been more than 10,000 Ebola deaths during the current outbreak, primarily in Liberia, Guinea and Sierra Leone.
More Must-Reads From TIME
- Jane Fonda Champions Climate Action for Every Generation
- Biden’s Campaign Is In Trouble. Will the Turnaround Plan Work?
- Why We're Spending So Much Money Now
- The Financial Influencers Women Actually Want to Listen To
- Breaker Sunny Choi Is Heading to Paris
- Why TV Can’t Stop Making Silly Shows About Lady Journalists
- The Case for Wearing Shoes in the House
- Want Weekly Recs on What to Watch, Read, and More? Sign Up for Worth Your Time
Write to Justin Worland at justin.worland@time.com