In China, the doubling time of the coronavirus disease epidemic by province increased during January 20–Feb-ruary 9, 2020. Doubling time estimates ranged from 1.4 (95% CI 1.2–2.0) days for Hunan Province to 3.1 (95% CI 2.1–4.8) days for Xinjiang Province. The estimate for Hubei Province was 2.5 (95% CI 2.4–2.6) days.
Bibliographical noteFunding Information:
G.C. receives support from National Science Foundation grant no. 1414374 as part of the joint NSF-NIH-USDA Ecology and Evolution of Infectious Diseases program. I.C.-H.F. receives salary support from the National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention (grant no. 19IPA1908208). This article is not part of I.C.-H.F.’s CDC-sponsored projects.