Table of contents  Table of contents  $^{ }$Figures and tables Figures and tables  Just a simple table of contents. The ECDC editors will format and update it.  Thiste x t bo xwillbe del etedby  th e  EC D C  e di to r i a lte a m a f te r  c o mpl e ti o n  o f  th e  doc ume n t. List of the figures and tables in the report. Only used if there are more than two. The list of the figures  and tables will be generated by the editors. Please leave this section blank.  Thiste x t bo xwillbe del etedby  th e  EC D C  e di to r i a lte a m a f te r  c o mpl e ti o n  o f  th e  doc ume n t. Table of contents..............................................................................................................4 Figures and tables ............................................................................................................4 Abbreviations ...................................................................................................................5 Executive summary ..........................................................................................................6 1 Introduction ..................................................................................................................7 2 Study design and methods .............................................................................................7 3 Results..........................................................................................................................8 4 Discussion.....................................................................................................................8 5 Conclusions...................................................................................................................9 6 Recommendations .........................................................................................................9 References..................................................................................................................... 10 Annex 1. Title................................................................................................................. 10 4 