DALLAS, Texas (CBSDFW.COM) – Officials from Dallas County Health announced Wednesday afternoon they have  begun monitoring four more travelers for the ebola virus disease.

According to DCHHS the travelers arrived in Dallas County from West Africa on Tuesday November 18th.

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The individuals are considered ‘low risk’ and the 21-day monitoring period will end on Monday December 8th.

“Everyone we are monitoring remains asymptomatic for Ebola,” said Zachary Thompson, DCHHS director. “We will continue with our public health follow-up until the 21-day period is complete.”

13 individuals in Dallas County are currently being monitored for ebola, according to the agency.

DCHHS Medical Director Dr. Christopher Perkins reminds the public who is at risk for ebola.

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“I want to emphasize to everyone that they are not at risk of getting Ebola unless they have come in contact with blood, bodily fluids, or contaminated objects from a person who is sick with Ebola,” Dr. Perkins said. “Individuals with the most risk include healthcare workers, family members, or others in close contact to a person with symptoms of Ebola.”

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