Contact tracing, or meticulously tracing individuals exposed to illness, has been key to combating outbreaks of Ebola, cholera and tuberculosis throughout the world. Dr. Sheila Davis of the nonprofit Partners in Health explains what the US can learn from those crises.
Among developing nations, cancer is an increasingly prevalent cause of death. It’s largely overtaken other diseases as the leading cause of death in those countries — mostly because there’s little or no access to affordable prevention and treatment.