A group from Nagoya Institute of Technology showed that the number of infected people after the status of the new coronavirus under the Infectious Diseases Act was shifted to "Class 5" using AI = artificial intelligence based on the latest data. The group led by Professor Akimasa Hirata used AI to estimate the number Of infected people based on data such as social media posts.

Since the beginning of April, posts on SNS suggesting a drinking party has decreased, and AI may have recognized that the spread of infection will be small.