Fig. 1. Overview of NK cell research. (A) Yearly numbers of NK cell-related publications from the mid-1970s up to 2024. (B) Proportion distribution of diseases focused on in NK cell studies in 2024. (C) Statistics of clinical trials of NK cell-based therapies (445 trials in total). The image was created with BioRender.com.
Abbreviations: NK, natural killer; CAR, chimeric antigen receptor.

Ann Lab Med 2025;45:146~159 https://doi.org/10.3343/alm.2024.0380