  Recent papers by Gavela et al. and Huet et al. claim to have shown that
incluion of higher order interactions between quasiparticles dramatically
decreases the baryon asymmetry of the universe which can arise in the Minimal
Standard Model. These papers employ an inconsistent calculational scheme which,
for instance, violates unitarity. We argue that their method cannot be
considered as reliable, and thus their conclusions cannot be considered as
justified.
