The World Health Organization has declared an end to the deadliest Ebola outbreak on record, reports the New York Times. The announcement comes after the countries hit hardest by the epidemic—Liberia, Sierra Leone, and Guinea—reported zero cases for 42 days, or two incubation periods. During its two thriving years, the epidemic killed 11,300 people and infected more than 28,500.

Eight Ebola health officials in Guinea—five health workers and three journalists—were found dead this afternoon in a village latrine in the Nzerekore region. Damantang Camara, a spokesman for Guinea's government, told Reuters, "Three of them had their throats slit." The health team went missing Tuesday after villagers threw rocks at them.

Kenyan officials announced that they'll be closing the country's borders to travelers from countries that have been affected by Ebola, as a means for preventing the spread of the disease.

Over the last several months, the deadliest-ever outbreak of the Ebola virus has torn through West Africa, claiming hundreds of lives and leaving hundreds more infected. If you're just catching up with the news, here's some of what we know about the disease, its spread, and how it might be stopped.

After a rap concert on the beach in Conakry, Guinea ended Tuesday night, at least 33 people were reported dead after a stampede occurred. Over 700 people had attended the concert and were asked to leave through a single gated exit.