Fig 2. Sex differences in neutralizing anti-RBD IgG ratios as a function of body fat percentage.

This figure illustrates the relationship between neutralizing anti-RBD (Receptor Binding Domain) IgG ratios and body fat percentage among university students, using the Lowess (Locally Weighted Regression) smoothing technique to highlight trends. Females and males are distinguished by diamonds and crosses, respectively, with the Lowess curve for females presented as a continuous line and for males as a dashed line.