Hidden Outbreak of COVID-19 in a Nursery School Among the Children's Family Members and Nursery Workers. Issue 10 (20th July 2022) - Tabata, Sakiko; Yamagishi, Takuya; Tsuchihashi, Yuuki; Sunagawa, Tomimasa; Suzuki, Naoki; Asari, Go; Abo, Rieko; Yamamoto, Harumi; Yasutomi, Kazunori; Tsukasa, Ohara; Tachibana, Yasuko; Kazuhiro, Okub; et al.