The Gambia announced its first case of COVID-19 late Tuesday. Health officials said a woman in her twenties had recently traveled from the United Kingdom. 

Health Minister Ahmadou Lamin Samateh said the government was working to trace passengers who were on the woman’s flight as well as other close contacts. 

Gambian officials announced a raft of measures to help contain the virus, including the closures of schools and religious centers, as well as a ban on large public gatherings. Travelers from other countries are being asked to isolate themselves for two weeks. 

Though this case is the first that the tiny West African nation has confimed, the Gambia is surrounded on three sides by Senegal, which is has one of the largest numbers of confirmed COVID-19 cases anywhere on the continent.