Tattoo ink induces inflammation in the draining lymph node and alters the immune response to vaccination

Proceedings of the National Academy of Sciences, Volume 122, Issue 48, December 2025. SignificanceIn this study, we characterized the immune responses to the tattoo ink accumulating in the lymph nodes (LNs). This is very relevant as tattoo ink commonly reaches and persists in this organ in most tattooed subjects, often lifelong. We have …