This issue of the ECDC Communicable Disease Threats Report (CDTR) covers the period 23 July - 29 July 2017 and includes updates on measles, seasonal influenza, West Nile fever, legionnaires' disease and chikungunya, dengue and Zika viruses.

This updated rapid risk assessment assesses the potential risk for European travellers to Cuba after an outbreak of cholera in the Cuban province of Granma expanded to the provinces of Santiago de Cuba, Camagüey and Guantanamo.

This risk assessment is triggered by the increase in the number of yellow fever cases among EU travellers with exposure in South America since August 2016 and assesses the risk of contracting yellow fever for travellers to South America.