Communicable disease threats report, 28 January-3 February 2018, week 5

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 28 January-3 February 2018 and includes updates on influenza A(H7N9), seasonal influenza, mass gathering monitoring (Olympics), MERS-CoV, poliomyelitis, and yellow fever.