Summary of global surveillance data of infectious diseases in January 2020

In January 2020, a total of 65 infectious diseases were reported globally, affecting 52 countries and regions. Except for influenza, the top five infectious diseases affecting greatest number of countries and regions were dengue fever (22), measles (19), malaria (8), legionellosis (8) and cerebrospinal meningitis (8).The top three infectious diseases with highest case fatality rates were Ebola virus disease (65.5%), Middle East respiratory syndrome (34.3%) and Lassa fever (15.9%). The top five infectious diseases with greatest number of deaths were novel coronavirus disease 2019（COVID-19）, measles, Lassa fever, dengue fever and Ebola virus disease. The prevalent infectious diseases in Africa were Ebola virus disease, cholera, yellow fever, Lassa fever and measles, the prevalent infectious diseases in Asia were COVID-19, Middle East respiratory syndrome and dengue fever, the prevalent infectious diseases in America was dengue fever.