In a groundbreaking study in the 1990s, researchers stated that herpesvirus 6 (HHV6)—could be somehow involved in the development of multiple sclerosis. However, upon further research, those claims were disproven due to HHV6 turning out to be two related, but distinct variants—HHV6A and HHV6B. Because the two viruses are similar, during the 90s and early,...