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Michael Duff, Associated Press
Five ambulances that were donated by the U.S. to help combat the Ebola virus are lined up following a ceremony attended by Sierra Leone's president Ernest Bai Koroma, in Freetown, Sierra Leone, Wednesday, Sept. 10, 2014. The United States donated five ambulances Wednesday to help Sierra Leone’s fight against Ebola, as the West African government acknowledged it can take up to 24 hours to pick up bodies in the spiraling crisis.

FREETOWN, Sierra Leone — The United States donated five ambulances Wednesday to help Sierra Leone's fight against Ebola as the West African government acknowledged it can take up to 24 hours to pick up bodies in the spiraling crisis.

More than 2,200 deaths throughout West Africa have been attributed to Ebola amid the worst outbreak of the disease in history. The sick have been using motorcycle taxis and other public transport to get to hospitals, further increasing the risk of transmitting the disease that kills about half its victims.

Kathleen FitzGibbon of the U.S. Embassy in Sierra Leone handed President Ernest Bai Koroma the keys to five ambulances Wednesday. The U.S. has spent more than $100 million responding to the outbreak.

"Together we will win this fight," Koroma told her.

Sierra Leone, Liberia and Guinea — the three countries hit hardest by the outbreak — are also in need of more protective gear for health care workers and more treatment beds for Ebola victims. The World Health Organization says about 1,000 more beds in isolation centers are needed.

The Bill & Melinda Gates Foundation announced Wednesday it will donate $50 million more to fight the Ebola outbreak, to purchase supplies and to develop vaccines, therapies and better diagnostic tools.

Doctors Without Borders has said bodies are being left to rot in the streets of Sierra Leone, a claim the country's health officials have rejected. But Ibrahim Ben Kargbo, an adviser to the president, did acknowledge that it can take up to a full day to retrieve a dead body because it must first be tested for Ebola.

Ebola is transmitted through bodily fluids. Dead bodies are particularly contagious and must be buried with extreme care. Experts say traditional burials that wash the dead have been a significant source of Ebola transmission.

Senegal, meanwhile, announced that its only confirmed Ebola patient has recovered. But Dr. Moussa Seydi told Senegalese radio the young man is still suffering psychologically after losing several relatives to the disease.

Associated Press journalists Babacar Dione in Dakar, Senegal, and Donna Gordon Blankinship in Seattle contributed to this report.