The Ebola outbreak in Nigeria appears to be contained, health officials said Tuesday.
The U.S. Centers for Disease Control and Prevention (CDC) said that due to a very rapid local and international response, the country may have fully contained its Ebola outbreak. The 21-day incubation period for the disease has passed.
Nigeria saw its first confirmed case of Ebola on July 17 when a Liberian-American man collapsed at a Nigerian airport after traveling from Liberia. The man infected the health workers who treated him, and the country experienced a total of 19 cases and seven deaths. Unlike in other countries like Guinea, Sierra Leone and Liberia, where it took months for Ebola to be recognized, the Nigerian government quickly declared a public health emergency when it discovered the traveler may have come in contact with 72 people at the airport and hospital.
The Nigerian government coordinated the outbreak response with state and national networks and rolled out a massive public education initiative, with trained “social mobilizers” who were deployed to do house to house visits in areas where an Ebola contact resided. Nigeria also recently worked to eradicate polio, and the country tapped into those strategies as part of their response.
Still, if there’s a lesson to be learned from Ebola thus far, it’s not to overestimate containment. As TIME reported last week, there was a period in April when it appeared Guinea’s outbreak had subsided. In actuality, there were several unreported and hidden cases that re-ignited the outbreak with an even greater wave of infections.