I'm not sure I entirely understand these things. My understanding was that they were caused by the herpes simplex virus. If that is the case then why aren't they vastly more contagious than they are? You would think that everyone on Earth would have them by this point if they were that contagious. So either I do have the right virus and it's not as contagious as I thought or it's a different virus entirely.
Clearly I need to come up with some other things to wonder about when I have free time.
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