Alt: Kristen Stewart is flexing her muscles and wearing a shirt that says “Crater” from the film Love Lies Bleeding. She’s hot and grimy at the same time.

The order of switching between the immunoglobulin heavy chain (Fc) is time dependent, progressing from IgM/D to IgG3/IgG1/IgA1/IgG2/IgG4 and later to IgE/IgA2. In this study, we show that B. burgdorfe...