Everyone can transmit the virus to a baby through a kiss or a hug.

Most people get the herpes simplex virus sometime during childhood. During the first outbreak, the following symptoms may occur for the baby:

• Pain in the mouth
• Poor drinking
• Swollen lymph nodes
• Gum inflammation
• Blisters on or around the mouth
• Fever
• Drowsiness
• Sore throat

A cold sore can be dangerous for a baby. If a baby is younger than 3 months and it gets the symptoms listed above, it is advised to see a doctor.