Be very careful if it comes out in your mouth, you are!

Cold sores, often called fever blisters, are a widespread viral infection most commonly caused by herpes simplex virus type 1 (HSV-1), although herpes simplex virus type 2 (HSV-2) can also be responsible when transmitted through oral-genital contact. These sores are highly contagious and can spread easily through direct physical contact, such as kissing, or indirectly…
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