The ECDC Communicable Disease Threats Report (CDTR) is a weekly bulletin for epidemiologists and health professionals on active public health threats. This issue covers the period from 3-9 March 2019 and includes updates on Leishmaniasis and Zika virus disease, Middle East respiratory syndrome coronavirus (MERS-CoV), measles, Ebola virus disease, influenza, Rift Valley fever and mass gathering for Carnival in Brazil.