Kobayashi, Takaaki; Nishina, Yuka; Tomoi, Hana; Harada, Ko; Tanaka, Kyuto; Matsumoto, Eiyu; Horimukai, Kenta; Ishihara, Jun; Sasaki, Shugo; Inaba, Kanako; +4 more... Seguchi, Kyosuke; Takahashi, Hiromizu; Salinas, Jorge L; Yamada, Yuji; (2022) Corowa-kun: A messenger app chatbot delivers COVID-19 vaccine information, Japan 2021. Vaccine, 40 (32). pp. 4654-4662. ISSN 0264-410X DOI: https://doi.org/10.1016/j.vaccine.2022.06.007