Abstract
With an outbreak of the new coronavirus COVID-19, great attention has been paid to the number of infected people, and the future of the virus has been discussed with anxiety and anticipation. The economic impact of excessive curfews has also raised questions about the nature of infection prevention and the speed and effectiveness of vaccination. This paper reviews how we have estimated the number of infected people and the effectiveness of infection prevention measures from the early stages of infection when available data are limited. We introduce our efforts and challenges from the perspective of social simulation research.
