Diachronic Analysis of Users’ Stances on COVID-19 Vaccination in Japan using Twitter

To prevent and curb viral outbreaks such as COVID-19, it is important to increase vaccination coverage whileresolving vaccine hesitancy and refusal. To understand why COVID-19 vaccination coverage had rapidly increased in Japan, we analyzed Twitter posts (tweets) to examine the evolution of people’s stance on vaccination and clarify the factors of why people decide to …