The European Centre for Disease Prevention and Control (ECDC) reports that immunisation rates against the flu were far below target levels last season across Europe, with vaccination rates among older adults ranging from under 15% in Latvia and Poland to 76% in Denmark.Swedish Chief Physician Tina Crafoord highlights a rise in flu cases and urges vaccination for at-risk groups as the new H3N2 variant subclade K spreads unusually early this season, while current vaccines still provide good protection.