Four health boards in South Wales have instituted new mask-wearing regulations for visitors and staff due to rising flu cases. The Cardiff and Vale, Hywel Dda, Aneurin Bevan, and Cwm Taf Morgannwg health boards require masks in various hospital areas to control infection spread. Public Health Wales reported an increase in flu consultation rates, prompting officials to urge vaccinations and limit hospital visits for those with respiratory symptoms.