Table 1 Concentrations of IgG and IgA anti-SARS-CoV-2 antibodies in serum and breast milk 6 months after recruitment, according to the type of vaccine received

IgG serum (AU/mL)

BNT162b2

39

0.10, 0.52

0.25 (0.22, 0.29)

2.35

2,59

0.10

mRNA-1273

11

0.21, 0.53

0.34 (0.27, 0.41)

ChAdOx1-S

12

0.11, 0.48

0.29 (0.23, 0.36)

IgA serum (AU/mL)

BNT162b2

39

0.00, 0.16

0.02 (0.01, 0.03)

3.73

2,59

0.03

mRNA-1273

11

0.00, 0.14

0.05 (0.03, 0.06)

ChAdOx1-S

12

0.00, 0.03

0.01 (0.00, 0.03)

IgG breastmilk (AU/mL)

BNT162b2

39

0.03, 0.60

0.15 (0.10, 0.19)

1.15

2,59

0.32

mRNA-1273

11

0.05, 0.66

0.22 (0.14, 0.30)

ChAdOx1-S

12

0.03, 0.40

0.16 (0.08, 0.24)

IgA breastmilk (AU/mL)

BNT162b2

39

0.00, 0.16

0.05 (0.04, 0.07)

1.28

2,59

0.29

mRNA-1273

11

0.01, 0.32

0.08 (0.04, 0.11)

ChAdOx1-S

12

0.01, 0.09

0.04 (0.01, 0.07)