We finally know why some people got COVID while others didn’t

By Marko Nikolic, Principal Research Fellow/Honorary consultant Respiratory Medicine, UCL
Kaylee Worlock, Postdoc Research Fellow, Molecular and Cellular Biology, UCL

Throughout the pandemic, one of the key questions on everyone’s mind was why some people avoided getting COVID, while others caught the virus multiple times.

Through a collaboration between University College London, the Wellcome Sanger Institute and Imperial College London in the UK, we set out to answer this question using the world’s first controlled “challenge trial” for COVID – where volunteers were deliberately exposed to SARS-CoV-2, the virus that causes COVID, so that it could be studied in great…

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