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.
Small HSV-1 sores known as herpetic whitlow can appear on the fingers, especially in children who bite their nails or suck their fingers, which spreads the virus from the mouth to the hands. When someone develops a primary infection, the symptoms may last from 2 to 4 weeks.