Scientific discoveries are always being made, bringing vaccines into our lives that were not around during our childhood. The immunity provided by some of the vaccines received in childhood begins to fade over time.
Adults become more susceptible to serious disease caused by common infections as they age.
Chickenpox is far more devastating in adults than in children. The American Academy of Family Physicians and the Centers for Disease Control and Prevention recommend two doses of the varicella vaccine for adults, the second one given four to eight weeks after the first. Some cases of chickenpox can be so minor that you don't even know you had it. You can take a blood test to determine whether there was in fact a past infection. Our advice would be to get the vaccine without bothering to get a blood test.