Genetic variant powers up immune cells that remember SARS-CoV-2 Nature, Published online: 29 September 2023; doi:10.1038/d41586-023-03009-2People with a specific variant had more active thymus glands, which produce immune cells that fight off infection. #press https://www.nature.com/articles/d41586-023-03009-2?utm_source=press.coop