North & Central America

This archive covers progress stories from North and Central America, spanning the U.S., Canada, Mexico, and the nations of Central America. Readers will find reporting on health, environment, community resilience, and policy advances across the region.

Person with alopecia, for article on alopecia areata treatment

U.S. FDA approves first alopecia drug that restores hair growth in many patients

Alopecia areata has affected roughly 7 million Americans without a single FDA-approved systemic treatment — until now. Baricitinib works by blocking the inflammatory signals that cause the immune system to attack hair follicles, giving them a chance to recover. In clinical trials, one in three patients with severe cases regrew enough hair to cover at least 80% of their scalp. Approval also unlocks insurance coverage, turning a once-inaccessible therapy into a realistic option. This breakthrough shows how a single curious clinician, one patient, and a decade of persistence can rewrite what medicine believes is possible.