Ebola patient has been downgraded from serious to critical at the National Institutes of Health in Sierra Leone . Second American who was possibly exposed to Ebola moved to Nebraska Medicine 's biocontainment unit after change in symptoms .
Ebola patient has been downgraded from serious to critical at the National Institutes of Health in DC . Second American who was possibly exposed to Ebola moved to Nebraska Medicine 's biocontainment unit after change in symptoms .