Drug resistance

Antimicrobial resistance "also known as drug resistance" occurs when microorganisms such as bacteria, viruses, fungi and parasites change in ways that render ineffective the medications used to cure the infections they cause.

When the microorganisms become resistant to most antimicrobials, they are often referred to as "superbugs". This is a major concern because a resistant infection may kill, can spread to others, and imposes huge costs to individuals and society.