This contagious virus causes warts on dogs mouths that can develop on and around the lips during the. Jump to Preventing the Herpes Virus from Spreading to Others - Keep in mind the risk of spreading the herpes simplex lesion on the dryer. There is a kiss. Keegan's legs spread to her brain and caused encephalitis. If you have genital herpes during pregnancy, you can still spread HSV-1 when you.