SV40
SV40 is an abbreviation for simian vacuolating virus 40 or simian virus 40, a polyomavirus that is found in both monkeys and humans. It was named for the effect it produced on infected green monkey cells, which developed an unusual number of vacuoles. Like other polyomaviruses, SV40 is a DNA virus that has the potential to cause tumors in animals, but most often persists as a latent infection.
The discovery of SV40 revealed that between 1955 and 1963 around 90% of children and 60% of adults in the U.S. were inoculated with SV40-contaminated polio vaccines.