Ebola bio-hazard suit: How to wear it and what can go wrong
15 October 2014 Last updated at 18:22 BST
A second health worker in the US state of Texas has tested positive for Ebola after they were treating an infected patient who later died.
Confidence in the protocols used to keep health workers safe has been shaken by these transmissions of the virus.
The BBC's Alastair Leithead visited the National Biocontainment Training Centre in Galveston, Texas to try on a bio-hazard suit and see just how hard it is to guarantee the safety of Ebola doctors and nurses.