How Foreign Aid Cuts Are Setting the Stage for Disease Outbreaks

Organizations funded by the United States helped keep dangerous pathogens in check around the world. Now many safeguards are gone, and Americans may pay the price.

How Lagging Vaccination Could Lead to a Polio Resurgence

In its original form, the virus survives in just two countries. But a type linked to an oral vaccine used in other nations has already turned up in the West.