21 January 2021

• A closer look at T cells reveals big differences in mild vs. severe COVID-19 cases
• Study finds genetic clues to pneumonia risk and COVID-19 disparities
• Why older adults must go to the front of the vaccine line
• COVID-19 infection in immunodeficient patient cured by infusing convalescent plasma, doctors report
• Survey: Frequent reports of missed medical care in US adults during the early phase of the COVID-19 pandemic