An assessment of the methods used and ease of information exchange between people involved at all levels of the surveillance system (providers, analysers and users of surveillance data). Include an assessment of the data and information provided and of the timeliness and types of outputs produced. The efforts made to disseminate these outputs including the use of web-based systems should also be assessed. The methods used to provide feedback to data providers and to increase their awareness about hazards and surveillance activities should also be assessed. Internal communication and dissemination is directed at those working within the surveillance network or system. External communication and dissemination is directed at those outside the surveillance network or system (e.g. international organisations).