(CNN) -- As the death of the first patient diagnosed with Ebola in the U.S. sparks more fears, airports are beefing up screening for people from affected nations. With developments pouring in from all corners of the world, here's what you need to know to quickly get caught up on the latest: WEST AFRICA No relief in sight: The world's largest outbreak of Ebola has killed more than 3,800 people, the World Health Organization said Wednesday. The numbers reflect confirmed Ebola cases in Guinea, Liberia, Nigeria, Senegal, Sierra Leone and the United States, the WHO said. The virus is affecting medical workers. A United Nations official is being treated in Liberia after contracting Ebola. The unnamed worker is the second U.N. member infected with the virus in Liberia. The first one died last month.
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NEW: Liberian president "a bit more confident" about avoiding most dire predictions
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NEW: Spokesman: US Airways followed CDC guidelines after health scare on Dominican flight
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After negative test, Texas sheriff's deputy is discharged
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Hotel closed in Macedonia after sudden death, ministry says
A @placeholder hotel has closed after a person staying there died two hours after being taken to a hospital, the country's health ministry announced Thursday.