Shingles Recurrence Risk and Varicella-Zoster Virus Exposure

Understanding VZV Transmission and Immunity

Individuals who have already had shingles are immune to varicella-zoster virus (VZV) and cannot acquire a new infection from external exposure, as stated by the Centers for Disease Control and Prevention guidelines 1
Exposure to someone with chickenpox or shingles can only cause primary chickenpox infection in susceptible individuals, not shingles, according to the Centers for Disease Control and Prevention guidelines 1
If you have a history of shingles, you already have latent VZV in your nervous system and are immune to acquiring new infection from others, as per the Centers for Disease Control and Prevention guidelines 1

Only VZV-susceptible individuals, defined as those with no history of chickenpox or shingles, or who are seronegative for VZV, need to avoid exposure to chickenpox or shingles, as recommended by the Centers for Disease Control and Prevention 2, 3, 4, 5

External exposure to chickenpox or shingles is not listed as a risk factor for shingles recurrence, as stated by the Centers for Disease Control and Prevention guidelines 2, 3

For someone with a history of shingles exposed to chickenpox, no action is needed, as the individual is already immune to VZV, according to the Centers for Disease Control and Prevention guidelines 1
Neither VZIG nor acyclovir is recommended for prophylaxis in individuals with a history of shingles, as per the Centers for Disease Control and Prevention guidelines 2, 3, 1
Individuals with prior shingles do not need to avoid exposure to chickenpox or shingles, as stated by the Centers for Disease Control and Prevention guidelines 2, 3