What’s the difference between influenza A and influenza B, and does it matter which you catch? By Knvul Sheikh Each fall, the flu emerges as a formidable force, spreading through the droplets ...

A physician assistant (PA) is a health care professional who works with doctors and gives medical treatment. You can find physician assistants in virtually all primary care and specialty medical ...

Mark Gurarie is a freelance writer covering health topics, technology, music, books, and culture. He also teaches health science and research writing at George Washington University's School of ...