Abstract: The systems, devices, and methods utilize devices configured to (i) control the loading of each channel layer and/or (ii) prevent formation of bubbles within the channels. A device may include two or more stacked layers. The two or more stacked layers may include a first layer and a second layer. The first entry region diameter of the first layer and the second entry region diameter of the second layer may be different; and/or the first exit region diameter of the first layer and the second exit region diameter of the second layer may be different; and/or one or more of the first channel dimensions (e.g., length and/or width) of the first layer and the one or more of the second channel dimensions (e.g., length and/or width) of the second layer may be different.

Abstract: The systems and methods are directed to leveraging the channel geometry and configuration to overcome diffusion limitations of current transduction systems. The methods may include a method of transducing target cells using a device. The device may include at least one continuous channel. The method may include delivering target cells and viral vectors into a transduction region of the channel. After transducing for some incubation time, a flushing solution may be delivered. The method may include collecting transduced cells after the transducing incubation time and the delivering of the flushing solution.

Abstract: The systems and methods are directed to leveraging the channel geometry and configuration to overcome diffusion limitations of current transduction systems. The methods may include a method of transducing target cells using a device. The device may include at least one continuous channel. The method may include delivering target cells and viral vectors into a transduction region of the channel through a first inlet/outlet simultaneously and/or consecutively when one or more additional inlets/outlets that are located in a region of the channel downstream of the transduction are closed. After transducing for some incubation time, a flushing solution may be delivered through one or more of the additional inlets/outlets. The method may include collecting transduced cells after the transducing incubation time and the delivering of the flushing solution.