Measuring Herpes Zoster and PHN Associated Burden of Illness and Health Care Utilization Costs in Thailand

This will be a prospective cohort study of patients presenting with Zoster rash in 7 specialized institutions in Thailand.

Subjects will be entered in the cohort at the time of presentation with Zoster rash. After the baseline assessment (day 0) that will be conducted at the investigator's office there will be 4 assessments (prospective part of the study) that will be conducted at day 7, month 1, month 3 and month 6.

We expect that there will be approximately 150 patients included in the study cohort. Cohort assembly will take place between April 2007 and October 2007.

The study will be conducted in 3 groups

Eligible patients for each group will include

• Group A: Both male and female patients ≥ 50 years of age with Zoster rash.
• Group B: Both HIV infected male and female patients ≥ 20 years of age with Zoster rash.
• Group C: Both Oncology male and female patients ≥ 20 years of age who on chemotherapy with Zoster rash.

Key exclusion criteria includes patient who refuses to sign informed consent.