AKIPRESS.COM - More than 3,300 people have died from the Ebola outbreak in West Africa, according to the World Health Organization, as the deadly virus continues to spread.

In an update, the United Nations health agency said 3,338 had died of confirmed, suspected or probable cases of Ebolas through Sept. 28. A total of 7,178 cases have been reported.

In its update the previous week, the WHO reported that 3,091 people had died of confirmed, suspected or probable cases of Ebola, while a total of 6,574 cases had been reported through Sept. 23.

The disease remains concentrated in three countries—Guinea, Liberia and Sierra Leone—where the vast majority of the cases have occurred through Sept. 28. The WHO said that the situation in Guinea appears to have stabilized somewhat, with growth of the epidemic continuing in Sierra Leone and likely also in Liberia.

The latest update come a day after health officials confirmed the first case of Ebola in the U.S. The patient arrived in Texas from Liberia to visit family, developed symptoms of the disease on Sept. 24 and was admitted to an isolation unit at Texas Health Presbyterian Hopsital in Dallas four days later.

The patient isn't the first to be treated for Ebola in the U.S. But he is the first to have become ill here. Officials have launched an intensive medical and public-health effort both to treat the sick individual and to identify and monitor those people who he may have exposed to the disease in the four days between when he first developed symptoms and when he was placed into hospital isolation.

In Africa, the high number of infections in health-workers remains a concern, the WHO stated, with 377 health-care workers infected through Sept. 28, 216 of whom have died.

In Guinea, there has been one confirmed case reported in the newly affected Beyla district, on the border with Côte d'Ivoire. In Liberia, the previously uninfected area of Grand Kru, near the border with Côte d'Ivoire, has now reported six confirmed cases.