Construction is continuing at the Maryland Proton Treatment Center in downtown Baltimore. It's one of three such centers under development in the Washington, D.C., region. Jenny Gold, KHN hide caption

itoggle caption Jenny Gold, KHN

Port Louis is the capital of Mauritius, known as the "Switzerland of Africa" because of its wealth and its mountains. The country has banned visitors from Ebola-stricken nations. Paul Russell/Corbis hide caption

itoggle caption Paul Russell/Corbis

A man stands above a new Ebola treatment center in Monrovia, Liberia. Health workers in Liberia, the hardest-hit nation, have turned people away from treatment units because of shortages of beds and staff. Pascal Guyot/AFP/Getty Images hide caption

itoggle caption Pascal Guyot/AFP/Getty Images

A patient at the Texas Health Presbyterian Hospital in Dallas has a confirmed case of Ebola, the Centers for Disease Control and Prevention says. He is being treated and kept in strict isolation. LM Otero/AP hide caption

itoggle caption LM Otero/AP

Adrian Hill, director of the Jenner Institute and chief investigator of the trials with an Ebola vaccine his organization developed, holds a vial of the vaccine. Steve Parsons/WPA Pool/Getty Images hide caption

itoggle caption Steve Parsons/WPA Pool/Getty Images

Boys show off their four-legged friends at a rabies vaccination drive set up by the Serengeti Health Initiative in the Bariadi District of Tanzania. Anna Czupryna/Courtesy of Serengeti Health Initiative hide caption

itoggle caption Anna Czupryna/Courtesy of Serengeti Health Initiative