Adult invasive meningococcal disease caused by Neisseria meningitidis classified as serogroup B and sequence type 15947. Issue 4 (14th December 2022) - Kado, Soichiro; Kamiya, Koji; Hosaka, Takashi; Kawamura, Tetsuya; Komatsu, Kenichi; Kajii, Eiji; Takahashi, Hideyuki; Komine, Mayumi; Ohtsuki, Mamitaro