CD79A and COVID-19: They found a higher concentration of anti-S1RBD IgA of SARS-CoV-2 in the breast milk of infected women (not vaccinated against COVID-19) in the second trimester of pregnancy (36%, 3 months after delivery; 38%, 6 months after delivery) and not in those infected in the third trimester (20%, 3 months after delivery; 28%, 6 months after delivery) [81].