3. The national contact points for secondary use referred to in paragraph 1 and the Union health data access service referred to in paragraph 2 shall connect to the cross-border infrastructure for secondary use, namely HealthData@EU. The national contact points for secondary use and the Union health data access service shall facilitate the cross-border access to electronic health data for secondary use for different authorised participants in HealthData@EU. The national contact points for secondary use shall cooperate closely with each other and with the Commission.