Harris et al. evaluate Fc-dependent functional antibodies with two widely used COVID vaccines in vaccinated Brazilian adults. Vaccine and natural immunity underlie the differences observed in Fcγ-receptor-binding (types I, IIa, and IIIa/b), IgG, IgM, and IgA production, and complement-fixing antibodies.
- Alexander W. Harris
- Liriye Kurtovic
- James G. Beeson