Nigeria’s Rapid response to an Ebola outbreak in the country seems to have stopped the spread of the disease in the Africa’s most populous nation, the U.S. Centers for Disease Control and Prevention (CDC) said in an update.

CDC credited the west African country  for quickly taking decisive actions to respond to sick travelers and limiting the spread of the worst Ebola outbreak among its citizens.

Ebola, which has a 90 percent death rate, has killed over 3000 people mostly in Liberia, Sierra Leone, and Guinea, while Nigeria and Senegal have also been mildly affected. The World Health Organization estimates that over 20,000 people will be infected with the disease by end of January 2015 if proper measures are not taken to curb it.

“Although Nigeria isn’t completely out of the woods, their extensive response to a single case of Ebola shows that control is possible with rapid, focused interventions,” CDC director Tom Frieden said in a release.

On July 17, a very sick traveler who was in hospital in Monrovia, Liberia, developed a fever and left hospital against medical advice. He arrived at the international airport in Lagos, a densely populated city of 21 million, on July 20.

By the time health workers recognized that he was infected, he’d exposed 72 people on planes, the airport and the hospital.

On Tuesday, officials with the U.S. Centers for Disease Control and Prevention published an update on the response to the outbreak in Nigeria, which included 19 laboratory-confirmed and one probable Ebola cases.

The traveler died on July 25 with 894 contacts identified and followed. The final three contacts are due to leave follow up on Oct. 2, at which point they’ll receive an all-clear, cbc.com reported.

By Sept. 18, all 67 contacts of the Ebola patient had completed the 21-day follow up with no further confirmed cases.