Scientists successfully use harmless viruses to investigate the nervous system in frogs

Virus. When you hear the word, you probably shudder. But not all viruses are bad or cause disease. Some are even used for therapeutic applications or vaccination. In basic research, they are often employed to infect certain cells, genetically modify them, or visualize neurons in the organism's central nervous system (CNS)—the command center made up of the brain, spinal cord, and nerves.