Adults with chickenpox are also not recommended to go to work because chickenpox is an infectious disease, whether it is chickenpox in children or adults, it is contagious. If you are around people who have not had chickenpox or have not been vaccinated against chickenpox, you are not immune. If you go to work, you will have contact with them, and you are likely to pass chickenpox to them. Adults with chickenpox should also be isolated from the time of diagnosis until the rash is completely crusted over. The time for the rash to fully crust over is not the same for everyone, and should depend on the specific performance of each person. Adults with chicken pox, the symptoms associated with it are generally slightly heavier than children, and there can be a significant fever after the chicken pox, the rash is likely to be prolonged, and the crusting time is likely to be delayed.