Table 2b.

Time of maternal infection and evidence of SARS‐CoV‐2 Spike‐specific antibodies in neonatal serum

Time of infection (first positive PCR)	No of cases (143)	Neonatal serum: IgG		Neonatal serum: IgM
Group 1 At delivery	13	Pos: 3	Mothers IgG+: 2	Pos: 1	Mother IgM+: 0
			Mothers IgG−: 1		Mother IgM−: 1
		Neg: 10	Mothers IgG+: 1	Neg: 12	Mothers IgM+: 2
			Mothers IgM−: 9		Mothers IgM−: 10
Group 2 1−7 days before delivery	85	Pos: 23	Mothers IgG+: 22	Pos: 0
			Mothers IgG−: 1
		Neg: 62	Mothers IgG+: 5	Neg: 85	Mothers IgM+: 11
			Mothers IgG−: 57		Mothers IgM−: 74
Group 3 8−14 days before delivery	23	Pos: 9	Mothers IgG+: 8	Pos: 1	Mothers IgM+: 1
			Mothers IgG−: 1		Mothers IgM−: 0
		Neg: 14	Mothers IgG+: 6	Neg: 22	Mothers IgM+: 6
			Mothers IgG−: 8		Mothers IgM−: 16
Group 4 >14 days before delivery	22	Pos: 18	Mothers IgG+: 16	Pos: 0
			Mothers IgG−: 2
		Neg: 4	Mothers IgG+: 3	Neg: 22	Mothers IgM+: 5
			Mothers IgM−: 1		Mothers IgM−: 17

Abbreviations: Neg, negative; Pos, postive.