The medical community has spent several years researching superbugs. Scientists now believe that the genes that create superbugs could be much older than they originally thought.
French researchers studied samples of a salmonella strain recently that dated back to 1911. In that study, they found that the genes that make the strain resistant to drugs existed back before the antibiotic used to treat the salmonella strain was available in 1961. Other researchers say that those types of genes may even have been around before that time.
For example, some have been found in areas like caves that were once thought to have been isolated for millions of years.
As a result of superbugs, the World Health Organization believes that key antibiotics could no longer be useful in the future.