Pediatric chickenpox is potentially contagious to adults who have not had chickenpox.
Pediatric chickenpox is caused by varicella zoster virus infection. Chickenpox is transmitted to susceptible hosts through contact with aerosolized droplets of nasopharyngeal secretions from infected persons or through direct skin contact with blister fluid from lesions.
Antibodies can be produced in the body after chickenpox infection, and lifelong immunity is achieved in most cases. Second attacks of chickenpox infection are rare in people with normal immune function.
Adults who have not had chickenpox are at high risk for chickenpox infection and may be infected. If you have to be in contact with a chickenpox patient, you can get the chickenpox vaccine if available to prevent the infection, and you also need to do a good job of isolating the patient.