(CNN) -- A CDC staff member was recently flown home to the United States on a private charter after spending time in close proximity with another health care worker who tested positive for Ebola in Sierra Leone.
The CDC worker is reportedly healthy and has shown no symptoms of the deadly virus. He or she is simply rotating back to the United States as previously scheduled, according to the CDC. It is CDC policy that people who have been exposed to Ebola and are traveling long distances do so on a private plane in the three weeks after exposure to lower the risk of spreading the infection.
"We think it's the right thing to do, to bring them home," CDC spokesman Tom Skinner said. "They want to come home. Their tour of duty was up, and we've made it crystal clear that if they go over there and have something like this happen and want to go home, we're going to bring them home."
The staff member will be monitored for 21 days -- the longest known incubation period -- for Ebola symptoms, but he or she currently "poses no Ebola-related risk to friends, family, co-workers, or the public," the CDC said in a statement.
The other health care worker, who tested positive for Ebola, has been flown to Germany to recover, Skinner said.
The World Health Organization said Monday that 120 health care workers have died in the Ebola outbreak, and twice that number have been infected.
Public health experts say several factors are to blame, including a shortage of protective gear and improper use of the gear they do have.
The fact that the disease has killed so many people working to care for infected patients is making it increasingly hard to combat the virus in West Africa, WHO said.
"It depletes one of the most vital assets during the control of any outbreak. WHO estimates that in the three hardest-hit countries, only one to two doctors are available to treat 100,000 people, and these doctors are heavily concentrated in urban areas."