The United States has rolled out new public health measures, including enhanced airport screening, following concerns over the possible spread of Ebola linked to parts of Africa.
The measures were announced by U.S. health authorities as infections rise in Democratic Republic of the Congo and neighbouring countries.
Officials said the steps were intended to reduce the risk of importing cases through international travel.
The Centers for Disease Control and Prevention confirmed that travellers arriving from affected regions would now undergo additional health checks.
It also noted that some visa-related processes have been temporarily adjusted for individuals linked to high-risk areas.
A health official involved in the response to Ebola virus disease said a U.S.-based worker in the Democratic Republic of Congo tested positive after suspected exposure during field operations.
The individual reportedly developed symptoms and is being transferred to Europe for treatment.
Authorities further stated that several other individuals with possible exposure are being relocated for medical monitoring and observation.
The World Health Organisation has declared the outbreak a major global health concern, reporting dozens of deaths and hundreds of suspected cases across affected regions.
Most infections, according to reports, have been recorded among adults in their twenties and thirties.
U.S. officials, however, maintain that the risk to the general public within the country remains low.
They added that response teams were being deployed to support surveillance, testing, and containment efforts in affected countries.
The U.S. government has also approved additional funding to strengthen international response operations aimed at controlling the outbreak at its source.
