SV40 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. It has the potential to cause tumors in animals, but most often persists as a latent infection. This virus was in the middle of a controversy as it was 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.
Hepatitis B share its symptoms with the A strain of the virus but the most important difference is that is only transmitted through blood and or body fluids and the range of the incubation period (average 90 days). It’s a chronic disease, so medication can only prevent large-scale liver problems. However there’s a vaccine that can prevent the contagion of this disease.