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In modern medicine, antibiotics are among the most powerful tools for preventing and treating life-threatening bacterial infections. Their effectiveness, however, often depends on using the right drug at the right time.

Nearly 1.5 million Americans and nearly 5% of women over the age of 55 have rheumatoid arthritis (RA), an incurable autoimmune disease marked by joint inflammation and subsequent damage. Despite advances in treatment, such as targeted immunotherapies, joint erosion persists even during disease remission. A new Yale study explains the cellular underpinnings of this ongoing joint destruction.

The Department of Internal Medicine is pleased to announce the 2026 fellows in the Department of Internal Medicine’s fellowship programs.

Congratulations to the following Yale Department of Internal Medicine faculty members, who were recently promoted, appointed, or reappointed.

Scientists discovered an unusual method of antibody production in the gut that may help future mucosal vaccine design.

Yale School of Medicine faculty members were recognized for publishing studies that rank in the top 1% based on the number of citations they received in their field.

A new study finds ammonia production in the gut drives a reduced appetite for protein when recovering from acute illness.

Discover the essential specialists for managing psoriatic arthritis. Learn how a comprehensive care team, including rheumatologists and dermatologists, can improve your health outcomes.

Deborah Dyett Desir, MD, is a 2025 recipient of the Master of the ACR designation, one of the highest honors that the College bestows on its members.