Vaccination boss concerned about more no shows as roll-out reaches younger age groups Cardiff and Vale health board are seeing around 8% no-shows for appointments 09:14, 14 APR 2021 Bayside is the largest testing centre in Cardiff (Image: Richard Swingler) There are always big stories on WalesOnline - don't miss any with our daily emailInvalid EmailSomething went wrong, please try again later. Sign me up now When you subscribe we will use the information you provide to send you these newsletters. Your information will be used in accordance with ourPrivacy Notice. Thank you for subscribingWe have more newslettersShow meSee ourprivacy notice A vaccine boss is concerned about the increasing number of no shows as the vaccine roll-out reaches younger age groups in Wales.