When shingles scab over are they contagious?

When shingles scab over, they are generally considered less contagious. The virus that causes shingles, varicella-zoster virus, can only be spread through direct contact with the fluid from the blisters. Once the blisters have crusted over and no longer have open sores, the risk of spreading the virus diminishes significantly. However, individuals who have never had chickenpox or have not been vaccinated against it can still contract the virus from someone with shingles, leading to chickenpox.