Study participants
infection
MAY, INFECTION
This study was conducted between October 2021 and May 2022. The flow of study participants is shown in Fig. Flow of study participantsEighty-six participants in the intervention group and 82 in the control group completed T3. Of the 86 participants in the intervention group, 73 became PPS, excluding 8, who responded after the deadline, and 6, who watched after the deadline (with duplicates, a total of 13 participants). Of the 82 participants in the control group, 73 had PPS, excluding nine who responded after the due date.The number of participants did not reach the originally expected number. This result was attributable to the schools’ response to COVID-19. The number of people infected with COVID-19 was declining in Japan in the fall of 2021. However, when this study began, schools reopened after the summer break; although students were able to attend school, schoolteachers were busy due to government orders to strengthen infection control measures in schools [