To prevent a severe allergic reaction, the test is started with a very dilute solution. After 10 minutes, the injection site is measured to look for growth of wheal, a small swelling of the skin. Two millimeters of growth in 10 minutes is considered positive.
To prevent a severe allergic response, the test commences with a very diluted solution. Following 10 minutes, the injection site is examined to detect an increase in wheal size, which represents a small swelling of the skin. A notable growth of two millimeters within this period is considered indicative of a positive result.