Pregnancy, fetal, and neonatal outcomes after a first booster dose of covid-19 vaccine during pregnancy in Ontario, Canada: population based, retrospective cohort study by Annette K Regan, Prakesh S Shah, Siri E Håberg, Sandra I Dunn, Ann E Sprague, Deshayne B Fell, Mark C Walker, Robert W Platt, Kumanan Wilson, Jeffrey C Kwong, Sarah A Buchan, Jon Barrett, Darine El-Chaâr, Jay S Kaufman, Eszter Török, Sarah E Wilson, Shannon E MacDonald, Sheryll Dimanlig-Cruz, Christopher A Gravel, Gillian D Alton, Tavleen Dhinsa, Nannette Okun, Liam Bruce

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