President Obama this week directed his administration to respond to the Ebola crisis in a “much more aggressive way” and appointed an Ebola czar. In Texas, churches offered special prayers for the infected U.S. health care workers. Meanwhile, Ebola continues its alarming spread in West African countries. The medical group Doctors Without Borders is training new workers but says it has reached its limits in dealing with the disease. The World Health Organization warned there could be 10,000 cases per week by December.

Watch our conversation with bioethicist George Annas on ethics and Ebola.