Country specific info! Covid-19 and travel advice pages in EU Member states and other European countries.
Here you will find some links to relevant official sources of information
Download the app Re-open EU' informing about various measures in place, including on quarantine and testing requirements for travellers, the EU Digital COVID certificate etc.
European Commission
Digital Green Certificate page (so-called 'Covid passport')
European Parliament
The EU's response to the corona virus
Council of the European Union
Overview of the latest meetings regarding Covid-19