WASHINGTON (Reuters) - U.S. lawmakers on Wednesday blasted Mylan NV Chief Executive Heather Bresch for sharply increasing prices for the EpiPen emergency allergy treatment at a congressional hearing in which Republicans and Democrats questioned the reasons behind rising U.S. drug costs.

(Reuters Health) - Tobacco smoke leaves its mark on DNA by changing a chemical code on the DNA molecule that can sometimes change gene activity, according to a new study.

(Reuters Health) - A new study has confirmed what your waistband has told you all along - you gain weight during the holidays.

(Reuters Health) - Having a vasectomy doesn't increase a man's risk of developing prostate cancer or dying from it, a U.S. study suggests.

LONDON (Reuters) - The United States performs poorly in U.N. rankings on progress towards global health goals due to its high levels of violence, alcohol abuse and childhood obesity, a study has found.

NEW YORK, Sept 21 (Reuters) - Three former New York state jail guards were arrested on Wednesday on federal charges that they participated in the 2013 beating of an inmate who suffered life-threatening injuries and had a clump of dreadlocks ripped from his head as a "trophy."

(Reuters) - United Nations member countries pledged for the first time on Wednesday to take steps to tackle the threat posed by drug-resistant superbugs in a coordinated effort to curb the spread of infections by pathogens that defy antimicrobial medicines.

GENEVA, Sept 21 (Reuters) - The United Nations is gearing up to resume aid deliveries in Syria suspended after a deadly attack on a relief convoy near Aleppo two days ago, officials said on Wednesday.

(Reuters) - The United States could save at least $15.5 billion in annual healthcare spending if malnutrition caused by chronic diseases is better addressed, according to a study.