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The second Dallas health care worker with Ebola was on a flight from Cleveland to Dallas on Monday — the day before she reported symptoms, the Centers for Disease Control and Prevention said Wednesday.

Because of the proximity in time between the Monday evening flight and the first report of her illness, the CDC wants to interview all 132 passengers on her flight — Frontier Airlines Flight 1143 from Cleveland to Dallas/Fort Worth, which landed at 8:16 p.m. CT Monday, the CDC said.

The second Dallas health care worker with Ebola should not have traveled on a commercial airplane, because she had cared for initial Dallas patient Thomas Eric Duncan, CDC Director Dr. Tom Frieden said today. The CDC will ensure from now on that people who are being monitored for possible Ebola symptoms will not travel, other than “controlled movement.”

WJW reports that the healthcare worker exhibited no signs or symptoms of illness while on flight 1143, according to the crew.

Frontier is working closely with CDC to identify and notify passengers who may have traveled on flight 1143 on Oct. 13.

Passengers who may have traveled on flight 1143 should contact CDC at 1 800-CDC INFO (1 800 232-4636).

In other developments, President Obama has postponed his planned Wednesday travel to New Jersey and Connecticut, and in the afternoon will hold a White House meeting of “cabinet agencies coordinating the government’s response to the Ebola outbreak,” the White House said. Obama will make brief remarks to the news media at the end of the meeting, the White House said.

And CDC Director Dr. Tom Frieden says the first Dallas health care worker with Ebola, Nina Pham, is in “improved condition today,” and the second Dallas health care worker with Ebola is “ill but clinically stable.” Frieden said it’s still to be determined whether Pham will be transferred to another facility; Frieden earlier said the second patient will be transferred to Emory University Hospital.

This is a developing story. Check back for details.

The CNN Wire contributed to this report.