As autumn moves to winter, the WHO/Europe, EC and ECDC are issuing a clear, urgent message: people who remain unprotected against both COVID-19 and seasonal influenza – especially the most vulnerable and at-risk – should take up any offer for vaccination to prevent or mitigate the impact of these co-circulating respiratory infections.
This document presents the core protocol for ECDC studies of CVE and IVE against symptomatic laboratory-confirmed influenza or SARS-CoV-2 infection, respectively, at primary care level.
Prevalence data from sources such as population surveys can be a useful complement to case based surveillance data for hepatitis B. Case-based surveillance has limitations as most diagnosed cases are chronic in nature and detection of cases depends largely on testing practices. Prevalence data can therefore contribute towards a fuller understanding of the epidemiology of hepatitis B.