Akinori Fujisawa, Shinichiro Kodama, Nafuko Konishi, Jun Ueda, Akiko Kitagawa, Eri Okada, Mariko Miyokawa, Yuriko Hirai, Eiji Nakatani, Masanori Fukushima. "Characterizing persistent Post-COVID-19 vaccination symptoms using MedDRA system organ class and preferred term classifications." Scientific Reports (2026). https://doi.org/10.1038/s41598-026-43949-z