Summary of global surveillance data of infectious diseases in January 2022

In January 2022, a total of 68 infectious diseases were reported globally, affecting 228 countries and regions. Except for influenza, the top five infectious diseases affecting greatest number of countries and regions were corona virus

disease 2019 (COVID-19, 228), dengue fever (26), measles (19), cholera (12) and leptospirosis (10). The top five infectious diseases with highest case fatality rates were Rift Valley fever (100.0%), Lassa fever (19.0%), yellow fever (15.5%), plague (7.5%) and West Nile fever (7.1%). The top five infectious diseases with greatest number of deaths were COVID-19, malaria, measles, Lassa fever and cholera. The prevalent infectious diseases in Asia were COVID-19 and dengue fever, the prevalent infectious diseases in Africa were COVID-19, cholera, yellow fever, Lassa fever, malaria and measles, the prevalent infectious diseases in America were COVID-19, dengue fever and chikungunya fever, the prevalent infectious disease in Europe was COVID-19.