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. 2022 Apr 25;9:891286. doi: 10.3389/fvets.2022.891286

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Copyright © 2022 Meng, Zhu, Ahmed, Ma, Wang, Deng, Chen, Lu and Yang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Ultrastructural analysis of microvascular groups via TEM after jet needle-free injection. (A) Ultrastructure of microvessels and surrounding cells after jet needle-free injection; (a) is the enlargement of the capillarie in (A); (b) is the enlargement of the dendritic cell in (A); (c) is the enlargement of dendritic cells and the T cell in (A); (B) Macrophages that engulf carbon nanoparticles. Bv, blood vessel; EC, endothelial cell; DC, dendritic cell. The scale bar (A) = 4 μm; (B) (a–c) = 1 μm.