Chemokines (eotaxin, IP-10, MIP-1α, and RANTES/CCL5) and growth factors (fibroblast growth factor—FGF, granulocyte–macrophage colony-stimulating factor—GM-CSF, IL7, and platelet-derived growth factor-BB—PDGF-BB) also showed higher concentrations in the breast milk from the breastfeeding mothers with COVID-19 than in the control group at 1 week postpartum. Here, CCL5 is linked to COVID-19.