Final answer:
Needles smaller than 23 gauge are not recommended for drawing blood as they can cause infections.
Step-by-step explanation:
Needles smaller than 23 gauge are not recommended for drawing blood as they can cause infections. This is because smaller needles have a higher risk of needle sticks, which can lead to infections.
For example, drug addicts and phlebotomists, who draw blood as part of their profession, are at a higher risk of needle sticks. Dentists are also at risk because they often use needles.