Ebola Scare Hits Washington, Latest of About 100 Alerts to CDC

The CDC has fielded about 100 alerts for possible Ebola cases since July.

Officials are also monitoring an inmate at Cobb County Jail in Georgia. However, the initial blood test was negative for Ebola, according to the Cobb County Sheriff's Office.

Though the scares have put some on edge, the cases are not unique. After issuing an alert to hospitals and medical providers in July, the CDC has looked into approximately 100 Ebola scares in 33 states, as of Oct. 1, the agency said.

"We're striving for perfection, but what we continue to do is redouble our efforts and ... use this as learning experience," Bell said.

Diagnosing the deadly virus can be difficult. The early symptoms of the Ebola virus, including fever chills and abdominal pain, are similar to many other diseases and can be difficult to diagnose correctly.

After a hospital or state lab identifies a possible Ebola case based on both travel history and symptoms, they notify the CDC. CDC officials then talk to someone familiar with the patient's history to determine whether blood testing for the virus is necessary, CDC spokeswoman Kristen Nordlund told ABC News in an earlier interview.

Dr. William Schaffner, an infectious disease expert from Vanderbilt University Department of Medicine, said it is not surprising that only a small percentage of the patients investigated had a blood test to check for Ebola.

Schaffner said he would not be surprised if there are a rash of new calls to the CDC from hospitals or state labs in the next few days and weeks in light of the intense media coverage of the first Ebola patient diagnosed in the U.S.

"Having all those inquiries come into the CDC are very, very indicative of the fact that the medical care community are on the alert and thinking about [Ebola]," Schaffner said. "It keeps all of us on our toes."