This time of year, many of us pause to reflect on what we’re grateful for—family, friends, health, and the comforts of home. But there’s one group we often overlook: The people we work with every day.

The idea that NK cells can distinguish aberrant cells by recognizing 'absence of the expected', rather than 'presence of the unexpected' emerged more than 25 years ago. Klas Kärre recapitulates how ...