Guidance The national influenza immunisation programme 2021 to 2022 (WHC/2021/004) Letter to health professionals about the national influenza immunisation programme 2021 to 2022. Part of: Health circulars: 2021 to 2023, Vaccination and immunisation Welsh Health Circulars (WHC) and Vaccination (Sub-topic) First published: 19 February 2021 Last updated: 19 February 2021 Documents The national influenza immunisation programme 2021 to 2022 (WHC/2021/004) The national influenza immunisation programme 2021 to 2022 (WHC/2021/004) , HTML HTML
