Spouses mattered more than genes for the risk of severe COVID-19

Why did some people become severely ill with COVID-19 while others experienced only mild symptoms? Associate professor Maria Timofeeva and assistant professor Jacob Krabbe Pedersen from the Department of Public Health at the University of Southern Denmark (SDU) and their colleagues investigated this question using data from more than 83,000 Danish twins and over 32,000 of their spouses.

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