Drug resistance refers to the ability of microorganisms such as bacteria, viruses, fungi, and parasites to resist the effects of drugs that were previously effective in treating infections caused by these microorganisms. Over time, the frequent use of antibiotics or antiviral drugs can result in the development of drug-resistant strains of these microorganisms. As a result, the drugs that once effectively treated infections caused by these microorganisms can become ineffective. This can lead to longer and more severe infections, the spread of disease to others, and higher healthcare costs. Drug resistance is a growing global problem and is considered one of the most pressing public health challenges of our time. Addressing drug resistance requires a coordinated and global approach, including appropriate use of antibiotics, increased investment in research and development of new drugs, and improved infection prevention and control practices.