Abstract
We found a strong correlation between travel volumes departing from Wuhan, Hubei Province before the Spring Festival and the extent of amplification of the outbreak of COVID-19 in China in 2020, with 100 top cities. Almost 70% of exportations were within cities in Hubei province.
Funding Information
  • Zhejiang Provincial Natural Science Foundation of China (LY20H150010, LY19H150004, LY18H150004)
  • National Natural Science Foundation of China (81901958, 81671909)