To describe the natural history of a condition or disease. To describe the natural history of a condition or disease. To determine effectiveness or cost effectiveness of treatments/services and/or health care products. To measure or monitor safety and harm. To measure quality of care.
According to the NMSS, attacks or flare-ups of symptoms only qualify as exacerbations if: 1  they occur at least 30 days from an earlier flare-up. 2  symptoms last for 24 hours or longer.
How Long Does A Herpes Outbreak Last. Genital herpes is a sexually transmitted disease (STD). Women are more commonly infected than men. For women who have sores, the first outbreak may last two to four weeks. Another outbreak can occur in weeks or months.