JA TERROR has organised a two days’ workshop on cross-sectoral collaboration in the response to a biological or chemical terror attack. The workshop took place in Zagreb (Croatia), on 29 and 30 November 2023, with the participation of 45 experts from 13 European JA partners’ countries, from the three relevant sectors: Health, Security-Law Enforcement, and Civil Protection. During the workshop, participants followed an itinerary through different working sessions on strategic preparedness and response components to identify and analyse key issues related to five selected topics with focus on cross-sectoral collaboration: 1. Surveillance systems, shared threat detection and joint risk assessment 2. Cross-sectoral emergency planning (including strategic stockpiling) & governance 3. Cross-sectoral information sharing and flow in preparedness and response 4. Cross-sectoral capacity building, human resources, training and exercise 5. Post-incident joint evaluation, recovery and corrective measures