Among other studies concentrating on the association between a maternal history of COVID-19 infection and the lactoferrin concentrations in the colostrum, an inverse relationship was found in a prospective study by Turin et al. That study involved 346 mothers of low-birth-weight newborns and showed that maternal peripartum infection was significantly associated with lower Lf concentrations in the colostrum [31]. The gene discussed is LTF; the disease is infection.