Symptomatic Stages of Cold Sores
When cold sores are present, they are highly contagious. The highest risk of infection occurs when there are active symptoms such as crusted-over sores or fluid-filled blisters. These sores contain a high concentration of the herpes simplex virus (HSV), making direct contact with them a potential source of infection. Additionally, the prodrome period, which is the time just before the appearance of sores, is another common period for transmission. The likelihood of contagion remains increased until the sores have fully healed.
Childhood Infection and Transmission of HSV
Many adults who are carriers of HSV (Herpes Simplex Virus) actually acquired the infection during their childhood. This virus can easily spread through skin-to-skin contact, such as hugs, as well as through kisses from parents and relatives. Although transmission during childbirth is possible, it is considered to be very rare. Furthermore, there are common childhood behaviors, such as sharing drinks and food or neglecting hand hygiene, that can significantly increase the risk of contracting HSV.