Humidified Forest Oils for Immune System Recovery in Stage I-III Breast or Prostate Cancer

PRIMARY OBJECTIVE: I. Determine the feasibility of using humidified phytoncides to simulate the forest greenspace immersion (simulated forest immersion therapy \[SFIT\]) in cancer patients with solid tumor who have completed surgery, chemo- and radiation therapy as an alternate method of access to the natural forest greenspace. SECONDARY OBJECTIVE: I. Determine the feasibility of collecting and analyzing immune system measures while deploying the simulated forest immersion therapy with forest oils (SFIT), as well as measuring natural killer (NK) cell number and activity, and perforin and granulysin. OUTLINE: Patients participate in SFIT, using humidified wood and fragrance oils, over 1 hour on day 1, day 3 or 4 and on day 7. Patients also undergo blood sample collection at baseline and on days 3 or 4 and 7 and participate in interviews at baseline and post-treatment.