Infectious diseases know no borders, whether it's Ebola spreading fromGuinea to Liberia, measles in the Fraser Valley brought to Canada from the Philippines, or MERS claiming victims across the Middle East. These health crises are grim reminders that new and old infectious diseases often strike where and when we least expect them, in ways that confound us.

As an array of international organizations, wealthy countries and charitable groups gear up to provide desperately needed resources to fight the outbreak, the absent doctors and volunteers are a reminder of the daunting practical obstacles. Many African health workers battling Ebola are contracting it themselves. At least 170 workers have gotten the disease, according to the World Health Organization, and more than 80 have died.

China's international reputation for humanitarian aid is among the worst of the globe's superpowers. As Quartz reports, the new shipment of millions of dollars in medical supplies and workers could be the beginnings of an attempt to reshape that reputation. Only 0.4% of China's foreign aid goes directly to humanitarian causes, rather that infrastructure projects or business efforts that could serve to improve nations' trade with China as much as it could help the nations themselves. In Africa, particularly, China's actions have appeared self-rewarding rather than altruistic.