The human mouth is such a breeding ground for bacteria, it's never a good idea to put your mouth on an open wound. The old-timey idea of sucking poison out of a snake bite is now considered more harmful than good, mainly because if a snake bites you the poison is going to go deep into your tissues and enter the bloodstream, and it's unlikely you'll be able to suck it out in the first place. Then adding all the bacteria from your mouth to an open wound just means it will get infected.
But anyone with cold sores which are caused by the herpes virus should keep their mouth away from another person's open wound, especially an infant which has an underdeveloped immune system.
But anyone with cold sores which are caused by the herpes virus should keep their mouth away from another person's open wound, especially an infant which has an underdeveloped immune system.
Christian apologetics is the art of rolling a dog turd in sugar and selling it as a donut.