The World Health Organization asks six African countries (Senegal, Guinea-Bissau, Mali, Ivory Coast, Sierra Leone, and Liberia) to be on the alert for possible Ebola outbreaks after Guinea and the Democratic Republic of Congo reported new cases that signaled a resurgence of the outbreak.
U.S. researchers say that the Marburg virus has been found for the first time in West African bats, notably in Egyptian rousette fruit bats in Sierra Leone. Marburg is a "cousin" of the Ebola virus disease, which too may be spread by bats.
A 15-year-old boy from Liberia's Paynesville district, who tested positive for Ebola last week, dies of the disease at a treatment center near the capital, Monrovia, just over 11 weeks after the World Health Organization (WHO) declared the country free of the virus. The boy's father and brother, who also tested positive, are at the center; his mother and two other siblings were admitted for observation. In addition, 160 people who came in direct contact with the boy, are being monitored.
United States authorities announce mandatory Ebola screening will end for travelers from Liberia to five U.S. airports, effective September 21, 2015. Screening of travelers from Sierra Leone and Guinea will continue.