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Start creating presentations in PowerPoint: Complete guide

This beginner guide walks you through Microsoft PowerPoint 2019 step by step. Learn how to create, design, and present slides ...
BMJ Open

Longitudinal serological detection of exposure to SARS-CoV-2 in a cohort of pregnant women in Malawi: a secondary analysis from a randomised controlled trial

Objective To investigate whether IgG to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) antigens could reveal undetected SARS-CoV-2 exposure in a cohort of Malawian pregnant women ...