El Salvador's President Nayib Bukele heads to the White House to discuss further cooperation with the U.S., including the continued use of El Salvador's supermax prison for deported migrants.

Scientists have created a broadly effective antivenom using the blood of a Wisconsin man who has spent years exposing himself to deadly snakebites from black mambas, taipans, cobras and many…

The Food and Drug Administration aims to evaluate treatments for rare diseases based on plausible evidence that they would work — without requiring a clinical trial first.