That’s kind of a flippant answer. I hope you know that viruses (particularly the herpes family) cause at least some forms of cancer and herpes is super transmis

That’s kind of a flippant answer. I hope you know that viruses (particularly the herpes family) cause at least some forms of cancer and herpes is super transmissible and most people have some form (in particular familial herpes but also chicken pox). Can you catch it from riding a bus? Probably not. But I don’t think you were talking about literally from riding a bus but we don’t know if it’s a viral infection that’s untreated and has flare ups or if you can treat the viral infection and get reinfected. It wouldn’t surprise me if it’s both - typically it’s a flare up but even if you cured the viral infection you could get reinfected and get cancer expressed again.