 Preliminary data has shown that administration of a relaxation-response based intervention, Tai Chi Chih TCC, results in improvements in health functioning and VZV immunity in older adults as compared to a control group. TCC is a slow moving meditation comprised of twenty separate standardized movements for use in elderly populations. By standardization of training and practice schedules, TCC offers an important advantage over prior relaxation response based therapies. This controlled trial has 3 goals: 