![Bystander CD4+ T cells: crossroads between innate and adaptive immunity | Experimental & Molecular Medicine Bystander CD4+ T cells: crossroads between innate and adaptive immunity | Experimental & Molecular Medicine](https://media.springernature.com/m685/springer-static/image/art%3A10.1038%2Fs12276-020-00486-7/MediaObjects/12276_2020_486_Fig1_HTML.png)
Bystander CD4+ T cells: crossroads between innate and adaptive immunity | Experimental & Molecular Medicine
![T Cell Activation and Effector Functions - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO) T Cell Activation and Effector Functions - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO)](https://www.astro.org/uploadedImages/_MAIN_SITE/Patient_Care/Research/Research_Primers/Content_Pieces/Fig15.jpg?n=140)
T Cell Activation and Effector Functions - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO)
![Immune System Overview - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO) Immune System Overview - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO)](https://www.astro.org/uploadedImages/_MAIN_SITE/Patient_Care/Research/Research_Primers/Content_Pieces/Fig2.jpg?n=8577)
Immune System Overview - American Society for Radiation Oncology (ASTRO) - American Society for Radiation Oncology (ASTRO)
![T cell activation. Once activated, the T cells start producing IL-2,... | Download Scientific Diagram T cell activation. Once activated, the T cells start producing IL-2,... | Download Scientific Diagram](https://www.researchgate.net/publication/337112173/figure/fig2/AS:823013587050496@1573233138294/T-cell-activation-Once-activated-the-T-cells-start-producing-IL-2-which-is-required.png)
T cell activation. Once activated, the T cells start producing IL-2,... | Download Scientific Diagram
![T cell activation | What are the 3 signals for T cell activation? T cell differentiation| Immunology - YouTube T cell activation | What are the 3 signals for T cell activation? T cell differentiation| Immunology - YouTube](https://i.ytimg.com/vi/R_9lNOByPpE/maxresdefault.jpg)