If you think the fight against Ebola is going well, here’s a grim new number: 537.
That’s how many new infections were reported in Sierra Leone in the past week. It’s the highest weekly tally in any country since the West African outbreak began.
International governments and aid groups have scrambled to open Ebola treatment centers in the country. But, because of safety concerns, many of these centers are accepting only a fraction of the number of patients they were built to serve.