A health care worker, who cared for Liberian Ebola patient Thomas Eric Duncan at Texas Health Presbyterian Hospital, tested positive for the Ebola Virus, hospital officials announced TODAY!  Duncan died on Wednesday.

The CDC will conduct confirmatory tests today and will share the results after the patient, who has not been identified, is notified, according to a CDC statement. If the preliminary diagnosis is confirmed, it would be the first known case of the disease being contracted or transmitted in the U.S.