Summary of global surveillance data of infectious diseases in October 2020

In October 2020, a total of 67 infectious diseases were reported globally, affecting 220 countries and regions. Except for influenza, the top five infectious diseases affecting greatest number of countries and regions were COVID-19 (219), dengue fever (35), poliomyelitis (14), measles (11) and chikungunya fever (10).The top five infectious diseases with highest case fatality rates were Ebola virus disease (42.3%), Rift Valley fever (33.3%), Lassa fever (20.6%), plague (13.7%) and West Nile fever (11.1%). The top five infectious diseases with greatest number of deaths were COVID-19, dengue fever, cholera, measles and West Nile fever. The prevalent infectious diseases were COVID-19 and dengue fever in Asia, COVID-19, Ebola virus disease, cholera, plague, Rift Valley fever, Lassa fever and measles in Africa, COVID-19 and dengue fever in America, and COVID-19 and West Nile fever in Europe.