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Neutralizing antibody levels detected in serum of lactating women over 2 vaccine doses expressed as WHO SARS-CoV-2 International Standard (n=21). Serum samples on day 21 is taken prior to receipt of Dose 2. A level >28 IU/ml was used as the cutoff for positive detection of neutralizing antibodies. Neutralizing antibody levels are presented as median (interquartile range), IU/ml.
