The problem has gotten so bad that some doctors are pondering a “post-antibiotic world.” The World Health Organization says countries need to boost surveillance for resistance and develop new drugs.

When the price of gold skyrocketed, illegal miners flooded into the country’s Amazon basin, eager to find even the tiniest bits of the precious metal. Trees and villagers have paid a price.

What’s causing the ailment that has struck 20,000 farmhands in Nicaragua and El Salvador? Pesticides? Alcoholism? Rat pee spreading an infection? A study from Boston University provides some answers.

Dr. Ian Crozier was Emory University Hospital’s sickest Ebola patient; his kidneys failed and he was on life support. He made a miraculous recovery and says the illness made him a better physician.

Just getting a measles vaccine to a child in Pakistan was once an impossible dream. Despite many obstacles, health workers have made great progress in stopping infectious diseases.