Summary of global surveillance data of infectious diseases in May 2020

In May 2020, a total of 61 infectious diseases were reported globally, affecting 218 countries and regions. Except for influenza, the top five infectious diseases affecting greatest number of countries and regions were COVID-19 (217), dengue fever (22), measles (16), Zika virus disease (14) and Chikungunya fever (13). The top three infectious diseases with highest case fatality rates were Ebola virus disease (65.8%), Lassa fever (19.4%) and COVID-19 (6.2%). The top five infectious diseases with greatest number of deaths were COVID-19, dengue fever, measles, cholera and Lassa fever. The prevalent infectious diseases in Asia were COVID-19 and dengue fever, the prevalent infectious diseases in Africa were COVID-19,Ebola virus disease, cholera, yellow fever, Lassa fever and measles, the prevalent infectious diseases in America were COVID-19, dengue fever, Zika virus disease and Chikungunya fever,the prevalent infectious diseases in Europe were COVID-19 and measles.