Recital 28

(28)Since the objectives of this Decision, cannot be sufficiently achieved by the Member States alone due to the cross-border dimension of serious threats to health and can, therefore, be better achieved at Union level, the Union may adopt measures, in accordance with the principle of subsidiarity as set out in Article 5 of the Treaty on European Union. In accordance with the principle of proportionality, as set out in that Article, this Decision does not go beyond what is necessary in order to achieve those objectives.