Results
Ten of twenty three symptomatic women had SARS-CoV-2 RNA in a
nasopharyngeal swab. Five (5/23, 21.7%) demonstrated serological
evidence of anti-SARS-CoV-2 IgG antibodies and seven (30.4%, 7/23) were
positive for IgM antibodies.
In the asymptomatic cohort, the prevalence of SARS-CoV-2 infection in
RNA was 0.16% (1/608). IgG SARS-CoV-2 antibodies were detected in
1·67% (10/598, 95% CI 0·8%-3·1%) and IgM in 3·51% (21/598, 95% CI
2·3–5·5%). Nine women had repeat testing between post baseline. Four
(4/9, 44%) remained IgM positive, one IgG positive. IgG anti SARS-CoV-2
antibodies were detectable in cord bloods from babies born to five
seropositive women who delivered during the study.