Infant Retractions Part 3: How to Grade Severity How do you assess the severity of retractions in infants? In this final part of the series, we cover the grading scale (0 to 3) and what each level tells you: ✔️ 0 = No retractions ✔️ 1 = Mild (1 location: subcostal or intercostal) ✔️ 2 = Moderate (2 of the following: nasal flaring, substernal, subcostal, intercostal) ✔️ 3 = Severe (3 of the following: substernal, intercostal, subcostal, suprasternal, supraclavicular, nasal flaring, head bobbing a